Internal compiler error: UndefRefError during compaction

[maleadt]

MWE, reduced from package using Automa.jl (regex code generator):

function f(x, y)
    if if x
        if if if if if if if if if if if if if if if if if if if @goto bar
        end end end end end end end end end end end end end end end end end end end
    end end
    @label foo
    if y end
    @label bar
    if (y || 0) && @goto foo
    end
end

Base.code_ircode(f, (Bool, Bool))

$ manyjulias --asserts master wip.jl                  
[ Info: Translated requested revision master to commit 631b5c39b72d91bec33262e14ce96f74de9aa7b6
ERROR: LoadError: UndefRefError: access to undefined reference
Stacktrace:
  [1] getindex
    @ Core.Compiler ./essentials.jl:13 [inlined]
  [2] getindex
    @ Core.Compiler ./compiler/ssair/ir.jl:244 [inlined]
  [3] process_node!(compact::Core.Compiler.IncrementalCompact, result_idx::Int64, inst::Core.Compiler.Instruction, idx::Int64, processed_idx::Int64, active_bb::Int64, do_rename_ssa::Bool)
    @ Core.Compiler ./compiler/ssair/ir.jl:1361
  [4] process_newnode!(compact::Core.Compiler.IncrementalCompact, new_idx::Int64, new_node_entry::Core.Compiler.Instruction, new_node_info::Core.Compiler.NewNodeInfo, idx::Int64, active_bb::Int64, do_rename_ssa::Bool)
    @ Core.Compiler ./compiler/ssair/ir.jl:1543
  [5] iterate_compact(compact::Core.Compiler.IncrementalCompact)
    @ Core.Compiler ./compiler/ssair/ir.jl:1654
  [6] iterate
    @ Core.Compiler ./compiler/ssair/ir.jl:1597 [inlined]
  [7] compact!(code::Core.Compiler.IRCode, allow_cfg_transforms::Bool)
    @ Core.Compiler ./compiler/ssair/ir.jl:1862
  [8] compact!
    @ Core.Compiler ./compiler/ssair/ir.jl:1860 [inlined]
  [9] run_passes(ci::Core.CodeInfo, sv::Core.Compiler.OptimizationState{Core.Compiler.NativeInterpreter}, caller::Core.Compiler.InferenceResult, optimize_until::Nothing)
    @ Core.Compiler ./compiler/optimize.jl:494
 [10] typeinf_ircode(interp::Core.Compiler.NativeInterpreter, method::Method, atype::Any, sparams::Core.SimpleVector, optimize_until::Nothing)
    @ Core.Compiler ./compiler/typeinfer.jl:922
 [11] code_ircode_by_type(tt::Type; world::UInt64, interp::Core.Compiler.NativeInterpreter, optimize_until::Nothing)
    @ Base ./reflection.jl:1511
 [12] code_ircode_by_type
    @ Base ./reflection.jl:1497 [inlined]
 [13] code_ircode(f::Any, types::Any; kwargs::@Kwargs{})
    @ Base ./reflection.jl:1488
 [14] code_ircode(f::Any, types::Any)
    @ Base ./reflection.jl:1483
 [15] top-level scope
    @ ~/Julia/tools/creduce/main.jl:13

Bisected to #50943

Occurs on PkgEval, https://s3.amazonaws.com/julialang-reports/nanosoldier/pkgeval/by_date/2023-08/31/BioStockholm.primary.log

[gbaraldi]

I can't reproduce on latest master, is it a special build? The original test fails for me however.

[maleadt]

It seems like the MWE only fails intermittently, but it still does on the latest master:

maleadt@deepsea4 ~/julia$ manyjulias --asserts master wip.jl                  
[ Info: Translated requested revision master to commit 631b5c39b72d91bec33262e14ce96f74de9aa7b6
Internal error: encountered unexpected error in runtime:
UndefRefError()

[maleadt]

Since there's apparently some trouble reproducing this, here's the minimally reduced version:

function parse_stockholm(::Type{T}, data::Union{String,Vector{UInt8}}) where {T}
    sequences  = []
    gr_records = []
    linenum = 1
    mark = 0
    seqdata = ""
    byte::UInt8 = 0x00
    p::Int = 1
    p_end::Int = sizeof(data)
    is_eof::Bool = true
    cs::Int = 1
    p_end = p_eof = lastindex(data)
    mem = data
    if p > p_end
    else
        if cs == 2
            @goto state_case_2
        else
            if cs == 3
                @goto state_case_3
            else
                if cs == 4
                    @goto state_case_4
                else
                    if cs == 5
                        @goto state_case_5
                    else
                        if cs == 6
                            @goto state_case_6
                        else
                            if cs == 7
                                @goto state_case_7
                            else
                                if cs == 8
                                    @goto state_case_8
                                else
                                    if cs == 9
                                        @goto state_case_9
                                    else
                                        if cs == 10
                                            @goto state_case_10
                                        else
                                            if cs == 11
                                                @goto state_case_11
                                            else
                                                if cs == 12
                                                    @goto state_case_12
                                                else
                                                    if cs == 13
                                                        @goto state_case_13
                                                    else
                                                        if cs == 14
                                                            @goto state_case_14
                                                        else
                                                            if cs == 15
                                                                @goto state_case_15
                                                            else
                                                                if cs == 16
                                                                    @goto state_case_16
                                                                else
                                                                    if cs == 17
                                                                        @goto state_case_17
                                                                    else
                                                                        if cs == 18
                                                                            @goto state_case_18
                                                                        else
                                                                            if cs == 19
                                                                                @goto state_case_19
                                                                            else
                                                                                if cs == 20
                                                                                    @goto state_case_20
                                                                                else
                                                                                    if cs == 21
                                                                                        @goto state_case_21
                                                                                    else
                                                                                        if cs == 22
                                                                                            @goto state_case_22
                                                                                        else
                                                                                            if cs == 23
                                                                                                @goto state_case_23
                                                                                            else
                                                                                                if cs == 24
                                                                                                    @goto state_case_24
                                                                                                else
                                                                                                    if cs == 25
                                                                                                        @goto state_case_25
                                                                                                    else
                                                                                                        if cs == 26
                                                                                                            @goto state_case_26
                                                                                                        else
                                                                                                            if cs == 27
                                                                                                                @goto state_case_27
                                                                                                            else
                                                                                                                if cs == 28
                                                                                                                    @goto state_case_28
                                                                                                                else
                                                                                                                    if cs == 29
                                                                                                                        @goto state_case_29
                                                                                                                    else
                                                                                                                        if cs == 30
                                                                                                                            @goto state_case_30
                                                                                                                        else
                                                                                                                            if cs == 31
                                                                                                                                @goto state_case_31
                                                                                                                            else
                                                                                                                                if cs == 32
                                                                                                                                    @goto state_case_32
                                                                                                                                else
                                                                                                                                    if cs == 33
                                                                                                                                        @goto state_case_33
                                                                                                                                    else
                                                                                                                                        if cs == 34
                                                                                                                                            @goto state_case_34
                                                                                                                                        else
                                                                                                                                            if cs == 35
                                                                                                                                                @goto state_case_35
                                                                                                                                            else
                                                                                                                                                if cs == 36
                                                                                                                                                    @goto state_case_36
                                                                                                                                                else
                                                                                                                                                    if cs == 37
                                                                                                                                                        @goto state_case_37
                                                                                                                                                    else
                                                                                                                                                        if cs == 38
                                                                                                                                                            @goto state_case_38
                                                                                                                                                        else
                                                                                                                                                            if cs == 39
                                                                                                                                                                @goto state_case_39
                                                                                                                                                            else
                                                                                                                                                                if cs == 40
                                                                                                                                                                    @goto state_case_40
                                                                                                                                                                else
                                                                                                                                                                    if cs == 41
                                                                                                                                                                        @goto state_case_41
                                                                                                                                                                    else
                                                                                                                                                                        if cs == 42
                                                                                                                                                                            @goto state_case_42
                                                                                                                                                                        else
                                                                                                                                                                            if cs == 43
                                                                                                                                                                                @goto state_case_43
                                                                                                                                                                            else
                                                                                                                                                                                if cs == 44
                                                                                                                                                                                    @goto state_case_44
                                                                                                                                                                                else
                                                                                                                                                                                    if cs == 45
                                                                                                                                                                                        @goto state_case_45
                                                                                                                                                                                    else
                                                                                                                                                                                        if cs == 46
                                                                                                                                                                                            @goto state_case_46
                                                                                                                                                                                        else
                                                                                                                                                                                            if cs == 47
                                                                                                                                                                                                @goto state_case_47
                                                                                                                                                                                            else
                                                                                                                                                                                                if cs == 48
                                                                                                                                                                                                    @goto state_case_48
                                                                                                                                                                                                else
                                                                                                                                                                                                    if cs == 49
                                                                                                                                                                                                        @goto state_case_49
                                                                                                                                                                                                    else
                                                                                                                                                                                                        if cs == 50
                                                                                                                                                                                                            @goto state_case_50
                                                                                                                                                                                                        else
                                                                                                                                                                                                            if cs == 51
                                                                                                                                                                                                                @goto state_case_51
                                                                                                                                                                                                            else
                                                                                                                                                                                                                if cs == 52
                                                                                                                                                                                                                    @goto state_case_52
                                                                                                                                                                                                                else
                                                                                                                                                                                                                    if cs == 53
                                                                                                                                                                                                                        @goto state_case_53
                                                                                                                                                                                                                    else
                                                                                                                                                                                                                        if cs == 54
                                                                                                                                                                                                                            @goto state_case_54
                                                                                                                                                                                                                        else
                                                                                                                                                                                                                            if cs == 55
                                                                                                                                                                                                                                @goto state_case_55
                                                                                                                                                                                                                            else
                                                                                                                                                                                                                                if cs == 56
                                                                                                                                                                                                                                    @goto state_case_56
                                                                                                                                                                                                                                else
                                                                                                                                                                                                                                    if cs == 57
                                                                                                                                                                                                                                        @goto state_case_57
                                                                                                                                                                                                                                    else
                                                                                                                                                                                                                                        if cs == 58
                                                                                                                                                                                                                                            @goto state_case_58
                                                                                                                                                                                                                                        else
                                                                                                                                                                                                                                            if cs == 59
                                                                                                                                                                                                                                                @goto state_case_59
                                                                                                                                                                                                                                            else
                                                                                                                                                                                                                                                if cs == 60
                                                                                                                                                                                                                                                    @goto state_case_60
                                                                                                                                                                                                                                                else
                                                                                                                                                                                                                                                    if cs == 61
                                                                                                                                                                                                                                                        @goto state_case_61
                                                                                                                                                                                                                                                    else
                                                                                                                                                                                                                                                        if cs == 62
                                                                                                                                                                                                                                                            @goto state_case_62
                                                                                                                                                                                                                                                        else
                                                                                                                                                                                                                                                            if cs == 63
                                                                                                                                                                                                                                                                @goto state_case_63
                                                                                                                                                                                                                                                            else
                                                                                                                                                                                                                                                                if cs == 64
                                                                                                                                                                                                                                                                    @goto state_case_64
                                                                                                                                                                                                                                                                else
                                                                                                                                                                                                                                                                    if cs == 65
                                                                                                                                                                                                                                                                        @goto state_case_65
                                                                                                                                                                                                                                                                    else
                                                                                                                                                                                                                                                                        @goto exit
                                                                                                                                                                                                                                                                    end
                                                                                                                                                                                                                                                                end
                                                                                                                                                                                                                                                            end
                                                                                                                                                                                                                                                        end
                                                                                                                                                                                                                                                    end
                                                                                                                                                                                                                                                end
                                                                                                                                                                                                                                            end
                                                                                                                                                                                                                                        end
                                                                                                                                                                                                                                    end
                                                                                                                                                                                                                                end
                                                                                                                                                                                                                            end
                                                                                                                                                                                                                        end
                                                                                                                                                                                                                    end
                                                                                                                                                                                                                end
                                                                                                                                                                                                            end
                                                                                                                                                                                                        end
                                                                                                                                                                                                    end
                                                                                                                                                                                                end
                                                                                                                                                                                            end
                                                                                                                                                                                        end
                                                                                                                                                                                    end
                                                                                                                                                                                end
                                                                                                                                                                            end
                                                                                                                                                                        end
                                                                                                                                                                    end
                                                                                                                                                                end
                                                                                                                                                            end
                                                                                                                                                        end
                                                                                                                                                    end
                                                                                                                                                end
                                                                                                                                            end
                                                                                                                                        end
                                                                                                                                    end
                                                                                                                                end
                                                                                                                            end
                                                                                                                        end
                                                                                                                    end
                                                                                                                end
                                                                                                            end
                                                                                                        end
                                                                                                    end
                                                                                                end
                                                                                            end
                                                                                        end
                                                                                    end
                                                                                end
                                                                            end
                                                                        end
                                                                    end
                                                                end
                                                            end
                                                        end
                                                    end
                                                end
                                            end
                                        end
                                    end
                                end
                            end
                        end
                    end
                end
            end
        end
    end
    begin
        begin
            @label state_1_action_2
            begin
                linenum += 1
            end
            @goto state_1
            @label state_1
            p += 1
            @label state_case_1
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                @goto state_4
            else
                if byte == 0x0a && true
                    @goto state_1_action_2
                else
                    if byte == 0x0d && true
                        @goto state_2_action_1
                    else
                        if byte == 0x23 && true
                            @goto state_3
                        else
                            cs = -1
                            @goto exit
                        end
                    end
                end
            end
        end
        begin
            @label state_4
            p += 1
            if p > p_end
                cs = 4
                @goto exit
            end
            @label state_case_4
            ()
            @label state_3
            p += 1
            if p > p_end
                cs = 3
                @goto exit
            end
            @label state_case_3
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x20 && true
                @goto state_5
            else
                cs = -3
                @goto exit
            end
        end
        begin
            @label state_5
            p += 1
            if p > p_end
                cs = 5
                @goto exit
            end
            @label state_case_5
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x53 && true
                @goto state_6
            else
                cs = -5
                @goto exit
            end
        end
        begin
            @label state_6
            p += 1
            if p > p_end
                cs = 6
                @goto exit
            end
            @label state_case_6
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x54 && true
                @goto state_7
            else
                cs = -6
                @goto exit
            end
        end
        begin
            @label state_7
            p += 1
            @label state_case_7
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x4f && true
            end
        end
        begin
            @label state_8
            p += 1
            if p > p_end
                cs = 8
                @goto exit
            end
            @label state_case_8
            ()
            byte = @inbounds(getindex(mem, p))
            @label state_9
            p += 1
            if p > p_end
                cs = 9
                @goto exit
            end
            @label state_case_9
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x4b && true
                @goto state_10
            else
                cs = -9
                @goto exit
            end
        end
        begin
            @label state_10
            p += 1
            if p > p_end
                cs = 10
                @goto exit
            end
            @label state_case_10
            @label state_case_11
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x4f && true
                @goto state_12
            else
                cs = -11
                @goto exit
            end
        end
        begin
            @label state_12
            p += 1
            if p > p_end
                cs = 12
                @goto exit
            end
            @label state_case_12
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x4c && true
                @goto state_13
            else
                cs = -12
                @goto exit
            end
        end
        begin
            @label state_13
            p += 1
            if p > p_end
                cs = 13
                @goto exit
            end
            @label state_case_13
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x4d && true
                @goto state_14
            else
                cs = -13
                @goto exit
            end
        end
        begin
            @label state_14
            p += 1
            if p > p_end
                cs = 14
                @goto exit
            end
            @label state_case_14
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x20 && true
                @goto state_15
            else
                cs = -14
                @goto exit
            end
        end
        begin
            @label state_15
            p += 1
            if p > p_end
                cs = 15
                @goto exit
            end
            @label state_case_15
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x31 && true
                @goto state_16
            else
                cs = -15
                @goto exit
            end
        end
        begin
            @label state_16
            p += 1
            if p > p_end
                cs = 16
                @goto exit
            end
            @label state_case_16
            ()
            byte = @inbounds(getindex(mem, p))
            @label state_17
            p += 1
            if p > p_end
                cs = 17
                @goto exit
            end
            @label state_case_17
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x30 && true
                @goto state_18
            else
                cs = -17
                @goto exit
            end
        end
        begin
            @label state_18
            p += 1
            if p > p_end
                cs = 18
                @goto exit
            end
            @label state_case_18
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_19_action_6
            else
                if byte == 0x0d && true
                    @goto state_20_action_5
                else
                    cs = -18
                    @goto exit
                end
            end
        end
        begin
            @label state_20_action_1
            begin
            end
            @goto state_20
            @label state_20_action_2
            begin
                linenum += 1
                begin
                    if haskey(gs_records, seqname)
                        if haskey(gs_records[seqname], feature)
                        end
                    else
                        gs_records[seqname] = OrderedDict(feature => text)
                    end
                end
            end
            @goto state_20
            @label state_20_action_3
            begin
                linenum += 1
                gc_records[feature] = append!(get(gc_records, feature, T[]), seqdata)
            end
            @goto state_20
            @label state_20_action_4
            begin
                linenum += 1
                sequences[seqname] = append!(get(sequences, seqname, T[]), seqdata)
            end
            @goto state_20
            @label state_20_action_5
            begin
                linenum += 1
            end
            @goto state_20
            @label state_20_action_6
            begin
                linenum += 1
                begin
                    if haskey(gf_records, feature)
                        gf_records[feature] *= " " * text
                    else
                        gf_records[feature] = text
                    end
                end
            end
            @goto state_20
            @label state_20
            p += 1
            if p > p_end
                cs = 20
                @goto exit
            end
            @label state_case_20
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_19
            else
                cs = -20
                @goto exit
            end
        end
        begin
            @label state_19_action_1
            begin
                linenum += 1
                begin
                    if haskey(gr_records, seqname)
                        (gr_records[seqname])[feature] = append!(get(gr_records[seqname], feature, T[]), seqdata)
                    else
                        gr_records[seqname] = OrderedDict(feature => seqdata)
                    end
                end
            end
            @goto state_19
            @label state_19_action_2
            begin
                linenum += 1
                begin
                    if haskey(gs_records, seqname)
                        if haskey(gs_records[seqname], feature)
                        end
                    else
                        gs_records[seqname] = OrderedDict(feature => text)
                    end
                end
            end
            @goto state_19
            @label state_19_action_4
            begin
                linenum += 1
                gc_records[feature] = append!(get(gc_records, feature, T[]), seqdata)
            end
            @goto state_19
            @label state_19_action_5
            begin
                linenum += 1
                sequences[seqname] = append!(get(sequences, seqname, T[]), seqdata)
            end
            @goto state_19
            @label state_19_action_6
            begin
                linenum += 1
            end
            @goto state_19
            @label state_19_action_7
            begin
                linenum += 1
                begin
                    if haskey(gf_records, feature)
                        gf_records[feature] *= " " * text
                    else
                        gf_records[feature] = text
                    end
                end
            end
            @goto state_19
            @label state_19
            p += 1
            if p > p_end
                cs = 19
                @goto exit
            end
            @label state_case_19
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_24_action_2
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_23
                else
                    if byte == 0x0a && true
                        @goto state_19_action_6
                    else
                        if byte == 0x0d && true
                            @goto state_20_action_5
                        else
                            if byte == 0x23 && true
                                @goto state_21
                            else
                                if byte == 0x2f && true
                                    @goto state_22
                                else
                                    cs = -19
                                    @goto exit
                                end
                            end
                        end
                    end
                end
            end
        end
        begin
            @label state_24_action_1
            begin
                mark = p
                sequences[seqname] = append!(get(sequences, seqname, T[]), seqdata)
            end
            @goto state_24
            @label state_24_action_2
            begin
                mark = p
            end
            @goto state_24
            @label state_24_action_4
            begin
                begin
                    if haskey(gf_records, feature)
                        gf_records[feature] *= " " * text
                    else
                        gf_records[feature] = text
                    end
                end
                mark = p
            end
            @goto state_24
            @label state_24_action_5
            begin
                mark = p
                begin
                    if haskey(gr_records, seqname)
                        (gr_records[seqname])[feature] = append!(get(gr_records[seqname], feature, T[]), seqdata)
                    else
                        gr_records[seqname] = OrderedDict(feature => seqdata)
                    end
                end
            end
            @goto state_24
            @label state_24_action_6
            begin
                gc_records[feature] = append!(get(gc_records, feature, T[]), seqdata)
                mark = p
            end
            @goto state_24
            @label state_24_action_7
            begin
                mark = p
                begin
                    if haskey(gs_records, seqname)
                        if haskey(gs_records[seqname], feature)
                        end
                    else
                        gs_records[seqname] = OrderedDict(feature => text)
                    end
                end
            end
            @goto state_24
            @label state_24
            p += 1
            if p > p_end
                cs = 24
                @goto exit
            end
            @label state_case_24
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
            end
        end
        begin
            @label state_25_action_2
            begin
                begin
                    seqname = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_25
            @label state_25
            p += 1
            if p > p_end
                cs = 25
                @goto exit
            end
            @label state_case_25
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_26_action_2
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_25
                else
                    cs = -25
                    @goto exit
                end
            end
        end
        begin
            @label state_26_action_2
            begin
                mark = p
            end
            @goto state_26
            @label state_26
            p += 1
            if p > p_end
                cs = 26
                @goto exit
            end
            @label state_case_26
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                linenum += 1
                begin
                    seqdata = if mark == 0
                            T[]
                        else
                            T.(collect(data[mark:p - 1]))
                        end
                    mark = 0
                end
            end
            @goto state_28
            @label state_28
            p += 1
            if p > p_end
                cs = 28
                @goto exit
            end
            @label state_case_28
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_27
            else
                cs = -28
                @goto exit
            end
        end
        begin
            @label state_27_action_1
            begin
                linenum += 1
                begin
                    seqdata = if mark == 0
                            T[]
                        else
                            T.(collect(data[mark:p - 1]))
                        end
                    mark = 0
                end
            end
            @goto state_27
            @label state_27
            p += 1
            if p > p_end
                cs = 27
                @goto exit
            end
            @label state_case_27
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_24_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_23_action_5
                else
                    if byte == 0x0a && true
                        @goto state_19_action_5
                    else
                        if byte == 0x0d && true
                            @goto state_20_action_4
                        else
                            if byte == 0x23 && true
                                @goto state_21_action_5
                            else
                                if byte == 0x2f && true
                                    @goto state_22_action_5
                                else
                                    cs = -27
                                    @goto exit
                                end
                            end
                        end
                    end
                end
            end
        end
        begin
            @label state_23_action_1
            begin
                begin
                    if haskey(gs_records, seqname)
                        if haskey(gs_records[seqname], feature)
                        end
                    else
                        gs_records[seqname] = OrderedDict(feature => text)
                    end
                end
            end
            @goto state_23
            @label state_23_action_2
            begin
                gc_records[feature] = append!(get(gc_records, feature, T[]), seqdata)
            end
            @goto state_23
            @label state_23_action_3
            begin
                begin
                    if haskey(gf_records, feature)
                        gf_records[feature] *= " " * text
                    else
                        gf_records[feature] = text
                    end
                end
            end
            @goto state_23
            @label state_23_action_5
            begin
                sequences[seqname] = append!(get(sequences, seqname, T[]), seqdata)
            end
            @goto state_23
            @label state_23_action_6
            begin
                begin
                    if haskey(gr_records, seqname)
                        (gr_records[seqname])[feature] = append!(get(gr_records[seqname], feature, T[]), seqdata)
                    else
                        gr_records[seqname] = OrderedDict(feature => seqdata)
                    end
                end
            end
            @goto state_23
            @label state_23
            p += 1
            if p > p_end
                cs = 23
                @goto exit
            end
            @label state_case_23
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                @goto state_23
            else
                if byte == 0x0a && true
                    @goto state_19_action_6
                else
                    if byte == 0x0d && true
                        @goto state_20_action_5
                    else
                        cs = -23
                        @goto exit
                    end
                end
            end
        end
        begin
            @label state_22_action_1
            begin
            end
            @goto state_22
            @label state_22_action_2
            begin
                gc_records[feature] = append!(get(gc_records, feature, T[]), seqdata)
            end
            @goto state_22
            @label state_22_action_3
            begin
                begin
                    if haskey(gf_records, feature)
                        gf_records[feature] *= " " * text
                    else
                        gf_records[feature] = text
                    end
                end
            end
            @goto state_22
            @label state_22_action_5
            begin
                sequences[seqname] = append!(get(sequences, seqname, T[]), seqdata)
            end
            @goto state_22
            @label state_22_action_6
            begin
                begin
                    if haskey(gr_records, seqname)
                        (gr_records[seqname])[feature] = append!(get(gr_records[seqname], feature, T[]), seqdata)
                    else
                        gr_records[seqname] = OrderedDict(feature => seqdata)
                    end
                end
            end
            @goto state_22
            @label state_22
            p += 1
            if p > p_end
                cs = 22
                @goto exit
            end
            @label state_case_22
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x2f && true
                @goto state_29
            else
                cs = -22
                @goto exit
            end
        end
        begin
            @label state_29
            p += 1
            if p > p_end
                cs = 29
                @goto exit
            end
            @label state_case_29
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_30_action_2
            else
                if byte == 0x0d && true
                    @goto state_31_action_1
                else
                    cs = -29
                    @goto exit
                end
            end
        end
        begin
            @label state_31_action_1
            begin
                linenum += 1
            end
            @goto state_31
            @label state_31
            p += 1
            if p > p_end
                cs = 31
                @goto exit
            end
            @label state_case_31
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_30
            else
                cs = -31
                @goto exit
            end
        end
        begin
            @label state_30_action_2
            begin
                linenum += 1
            end
            @goto state_30
            @label state_30
            p += 1
            if p > p_end
                cs = 30
                @goto exit
            end
            @label state_case_30
            ()
            byte = @inbounds(getindex(mem, p))
            begin
                cs = -30
                @goto exit
            end
        end
        begin
            @label state_21_action_1
            begin
                begin
                    if haskey(gs_records, seqname)
                        if haskey(gs_records[seqname], feature)
                        end
                    else
                        gs_records[seqname] = OrderedDict(feature => text)
                    end
                end
            end
            @goto state_21
            @label state_21_action_2
            begin
                gc_records[feature] = append!(get(gc_records, feature, T[]), seqdata)
            end
            @goto state_21
            @label state_21_action_3
            begin
                begin
                    if haskey(gf_records, feature)
                        gf_records[feature] *= " " * text
                    else
                        gf_records[feature] = text
                    end
                end
            end
            @goto state_21
            @label state_21_action_5
            begin
                sequences[seqname] = append!(get(sequences, seqname, T[]), seqdata)
            end
            @goto state_21
            @label state_21_action_6
            begin
                begin
                    if haskey(gr_records, seqname)
                        (gr_records[seqname])[feature] = append!(get(gr_records[seqname], feature, T[]), seqdata)
                    else
                        gr_records[seqname] = OrderedDict(feature => seqdata)
                    end
                end
            end
            @goto state_21
            @label state_21
            p += 1
            if p > p_end
                cs = 21
                @goto exit
            end
            @label state_case_21
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x3d && true
                @goto state_32
            else
                cs = -21
                @goto exit
            end
        end
        begin
            @label state_32
            p += 1
            if p > p_end
                cs = 32
                @goto exit
            end
            @label state_case_32
            ()
            byte = @inbounds(getindex(mem, p))
            @label state_33
            p += 1
            if p > p_end
                cs = 33
                @goto exit
            end
            @label state_case_33
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x43 && true
                @goto state_34
            else
                if byte == 0x46 && true
                    @goto state_35
                else
                    if byte == 0x52 && true
                    end
                end
            end
        end
        begin
            @label state_37
            p += 1
            if p > p_end
                cs = 37
                @goto exit
            end
            @label state_case_37
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                @goto state_38
            else
                cs = -37
                @goto exit
            end
        end
        begin
            @label state_38
            p += 1
            if p > p_end
                cs = 38
                @goto exit
            end
            @label state_case_38
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
            end
        end
        begin
            @label state_39_action_1
            begin
                mark = p
            end
            @goto state_39
            @label state_39
            p += 1
            if p > p_end
                cs = 39
                @goto exit
            end
            @label state_case_39
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_39
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_40_action_2
                else
                    cs = -39
                    @goto exit
                end
            end
        end
        begin
            @label state_40_action_2
            begin
                begin
                    seqname = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_40
            @label state_40
            p += 1
            if p > p_end
                cs = 40
                @goto exit
            end
            @label state_case_40
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_41_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_40
                else
                    cs = -40
                    @goto exit
                end
            end
        end
        begin
            @label state_41_action_1
            begin
                mark = p
            end
            @goto state_41
            @label state_41
            p += 1
            if p > p_end
                cs = 41
                @goto exit
            end
            @label state_case_41
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_41
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                end
            end
            @goto state_42
            @label state_42
            p += 1
            if p > p_end
                cs = 42
                @goto exit
            end
            @label state_case_42
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_43_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_42
                else
                    cs = -42
                    @goto exit
                end
            end
        end
        begin
            @label state_43_action_1
            begin
                mark = p
            end
            @goto state_43
            @label state_43
            p += 1
            if p > p_end
                cs = 43
                @goto exit
            end
            @label state_case_43
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x0e:0xff || (byte in 0x00:0x09 || (byte in 0x0b:0x0c || false))) && true
                @goto state_43
            else
                if byte == 0x0a && true
                    @goto state_44_action_1
                else
                    if byte == 0x0d && true
                        @goto state_45_action_1
                    else
                        cs = -43
                        @goto exit
                    end
                end
            end
        end
        begin
            @label state_45_action_1
            begin
                linenum += 1
                begin
                    text = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_45
            @label state_45
            p += 1
            if p > p_end
                cs = 45
                @goto exit
            end
            @label state_case_45
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_44
            else
                cs = -45
                @goto exit
            end
        end
        begin
            @label state_44_action_1
            begin
                linenum += 1
                begin
                    text = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_44
            @label state_44
            p += 1
            if p > p_end
                cs = 44
                @goto exit
            end
            @label state_case_44
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_24_action_7
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_23_action_1
                else
                    if byte == 0x0a && true
                        @goto state_19_action_2
                    else
                        if byte == 0x0d && true
                            @goto state_20_action_2
                        else
                            if byte == 0x23 && true
                                @goto state_21_action_1
                            else
                                if byte == 0x2f && true
                                    @goto state_22_action_1
                                else
                                    cs = -44
                                    @goto exit
                                end
                            end
                        end
                    end
                end
            end
        end
        begin
            @label state_36
            p += 1
            if p > p_end
                cs = 36
                @goto exit
            end
            @label state_case_36
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                @goto state_46
            else
                cs = -36
                @goto exit
            end
        end
        begin
            @label state_46
            p += 1
            if p > p_end
                cs = 46
                @goto exit
            end
            @label state_case_46
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_47_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_46
                else
                    cs = -46
                    @goto exit
                end
            end
        end
        begin
            @label state_47_action_1
            begin
                mark = p
            end
            @goto state_47
            @label state_47
            p += 1
            if p > p_end
                cs = 47
                @goto exit
            end
            @label state_case_47
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_47
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_48_action_2
                else
                    cs = -47
                    @goto exit
                end
            end
        end
        begin
            @label state_48_action_2
            begin
            end
            @goto state_48
            @label state_48
            p += 1
            if p > p_end
                cs = 48
                @goto exit
            end
            @label state_case_48
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_49_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_48
                else
                    cs = -48
                    @goto exit
                end
            end
        end
        begin
            @label state_49_action_1
            begin
                mark = p
            end
            @goto state_49
            @label state_49
            p += 1
            if p > p_end
                cs = 49
                @goto exit
            end
            @label state_case_49
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_49
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_50_action_2
                else
                    cs = -49
                    @goto exit
                end
            end
        end
        begin
            @label state_50_action_2
            begin
                begin
                    feature = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_50
            @label state_50
            p += 1
            if p > p_end
                cs = 50
                @goto exit
            end
            @label state_case_50
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_51_action_2
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_50
                else
                    cs = -50
                    @goto exit
                end
            end
        end
        begin
            @label state_51_action_2
            begin
                mark = p
            end
            @goto state_51
            @label state_51
            p += 1
            if p > p_end
                cs = 51
                @goto exit
            end
            @label state_case_51
            ()
            byte = @inbounds(getindex(mem, p))
            @label state_case_53
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_52
            else
                cs = -53
                @goto exit
            end
        end
        begin
            @label state_52_action_1
            begin
                linenum += 1
                begin
                    seqdata = if mark == 0
                            T[]
                        else
                            T.(collect(data[mark:p - 1]))
                        end
                    mark = 0
                end
            end
            @goto state_52
            @label state_52
            p += 1
            if p > p_end
                cs = 52
                @goto exit
            end
            @label state_case_52
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_24_action_5
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_23_action_6
                else
                    if byte == 0x0a && true
                        @goto state_19_action_1
                    else
                        if byte == 0x0d && true
                            @goto state_20_action_1
                        else
                            if byte == 0x23 && true
                                @goto state_21_action_6
                            else
                                if byte == 0x2f && true
                                    @goto state_22_action_6
                                else
                                    cs = -52
                                    @goto exit
                                end
                            end
                        end
                    end
                end
            end
        end
        begin
            @label state_35
            p += 1
            if p > p_end
                cs = 35
                @goto exit
            end
            @label state_case_35
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                @goto state_54
            else
                cs = -35
                @goto exit
            end
        end
        begin
            @label state_54
            p += 1
            if p > p_end
                cs = 54
                @goto exit
            end
            @label state_case_54
            ()
            byte = @inbounds(getindex(mem, p))
            @label state_55
            p += 1
            if p > p_end
                cs = 55
                @goto exit
            end
            @label state_case_55
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_55
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_56_action_2
                else
                    cs = -55
                    @goto exit
                end
            end
        end
        begin
            @label state_56_action_2
            begin
                begin
                    feature = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_56
            @label state_56
            p += 1
            if p > p_end
                cs = 56
                @goto exit
            end
            @label state_case_56
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_57_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_56
                else
                    cs = -56
                    @goto exit
                end
            end
        end
        begin
            @label state_57_action_1
            begin
                mark = p
            end
            @goto state_57
            @label state_57
            p += 1
            if p > p_end
                cs = 57
                @goto exit
            end
            @label state_case_57
            ()
            byte = @inbounds(getindex(mem, p))
            begin
                linenum += 1
                begin
                    text = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_59
            @label state_59
            p += 1
            if p > p_end
                cs = 59
                @goto exit
            end
            @label state_case_59
            ()
            byte = @inbounds(getindex(mem, p))
            @label state_58_action_1
            begin
                linenum += 1
                begin
                    text = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_58
            @label state_58
            p += 1
            if p > p_end
                cs = 58
                @goto exit
            end
            @label state_case_58
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_24_action_4
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_23_action_3
                else
                    if byte == 0x0a && true
                        @goto state_19_action_7
                    else
                        if byte == 0x0d && true
                            @goto state_20_action_6
                        else
                            if byte == 0x23 && true
                                @goto state_21_action_3
                            else
                                if byte == 0x2f && true
                                    @goto state_22_action_3
                                else
                                    cs = -58
                                    @goto exit
                                end
                            end
                        end
                    end
                end
            end
        end
        begin
            @label state_34
            p += 1
            if p > p_end
                cs = 34
                @goto exit
            end
            @label state_case_34
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                @goto state_60
            else
                cs = -34
                @goto exit
            end
        end
        begin
            @label state_60
            p += 1
            if p > p_end
                cs = 60
                @goto exit
            end
            @label state_case_60
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_61_action_1
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_60
                else
                    cs = -60
                    @goto exit
                end
            end
        end
        begin
            @label state_61_action_1
            begin
                mark = p
            end
            @goto state_61
            @label state_61
            p += 1
            if p > p_end
                cs = 61
                @goto exit
            end
            @label state_case_61
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_61
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_62_action_2
                else
                    cs = -61
                    @goto exit
                end
            end
        end
        begin
            @label state_62_action_2
            begin
                begin
                    feature = if mark == 0
                            ""
                        else
                            String(data[mark:p - 1])
                        end
                    mark = 0
                end
            end
            @goto state_62
            @label state_62
            p += 1
            if p > p_end
                cs = 62
                @goto exit
            end
            @label state_case_62
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
            end
        end
        begin
            @label state_63_action_2
            begin
                mark = p
            end
            @goto state_63
            @label state_63
            p += 1
            if p > p_end
                cs = 63
                @goto exit
            end
            @label state_case_63
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x21:0xff || (byte in 0x0e:0x1f || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || false)))) && true
                @goto state_63
            else
                if byte == 0x0a && true
                    @goto state_64_action_1
                else
                    if byte == 0x0d && true
                        @goto state_65_action_1
                    else
                        cs = -63
                        @goto exit
                    end
                end
            end
        end
        begin
            @label state_65_action_1
            begin
                linenum += 1
                begin
                    seqdata = if mark == 0
                            T[]
                        else
                            T.(collect(data[mark:p - 1]))
                        end
                    mark = 0
                end
            end
            @goto state_65
            @label state_65
            p += 1
            if p > p_end
                cs = 65
                @goto exit
            end
            @label state_case_65
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_64
            else
                cs = -65
                @goto exit
            end
        end
        begin
            @label state_64_action_1
            begin
                linenum += 1
                begin
                    seqdata = if mark == 0
                            T[]
                        else
                            T.(collect(data[mark:p - 1]))
                        end
                    mark = 0
                end
            end
            @goto state_64
            @label state_64
            p += 1
            if p > p_end
                cs = 64
                @goto exit
            end
            @label state_case_64
            ()
            byte = @inbounds(getindex(mem, p))
            if (byte in 0x30:0xff || (byte in 0x0e:0x1f || (byte in 0x24:0x2e || (byte in 0x00:0x08 || (byte in 0x0b:0x0c || (byte in 0x21:0x22 || false)))))) && true
                @goto state_24_action_6
            else
                if (byte in 0x09:0x09 || (byte in 0x20:0x20 || false)) && true
                    @goto state_23_action_2
                else
                    if byte == 0x0a && true
                        @goto state_19_action_4
                    else
                        if byte == 0x0d && true
                            @goto state_20_action_3
                        else
                            if byte == 0x23 && true
                                @goto state_21_action_2
                            else
                                if byte == 0x2f && true
                                    @goto state_22_action_2
                                else
                                    cs = -64
                                    @goto exit
                                end
                            end
                        end
                    end
                end
            end
        end
        begin
            @label state_2_action_1
            begin
                linenum += 1
            end
            @goto state_2
            @label state_2
            p += 1
            if p > p_end
                cs = 2
                @goto exit
            end
            @label state_case_2
            ()
            byte = @inbounds(getindex(mem, p))
            if byte == 0x0a && true
                @goto state_1
            else
                cs = -2
                @goto exit
            end
        end
    end
    @label exit
    if is_eof && (p > p_end && (cs > 29 && (begin
                            (cs < 94) & isodd(0x0000000000000001 >>> ((cs - 30) & 63))
                        end || false)))
        if cs == 30
        else
            ()
        end
        cs = 0
    end
end
parse_stockholm(Char, "  ")

[maleadt]

And reduced again:

function parse_stockholm()
    if if cs
        if cs if cs if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if if cs
        end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end end
    else
        if @goto bar
        end
    end
    @goto foo
    @label bar
    whatever
    @label foo
    if (y || 0) && @goto bar
    end end end
end
Base.code_ircode(parse_stockholm)

[gbaraldi]

This also has a broken stacktrace

julia> Base.code_ircode(parse_stockholm)
ERROR: UndefRefError: access to undefined reference
Stacktrace:
  [1] getindex
    @ Core.Compiler ./essentials.jl:13 [inlined]
  [2] getindex
    @ Core.Compiler ./compiler/ssair/ir.jl:260 [inlined]
  [3]
    @ Core.Compiler ./compiler/ssair/ir.jl:1381
  [4]
    @ Core.Compiler ./compiler/ssair/ir.jl:1577
  [5] iterate_compact(compact::Core.Compiler.IncrementalCompact)
    @ Core.Compiler ./compiler/ssair/ir.jl:1688
  [6] iterate
    @ Core.Compiler ./compiler/ssair/ir.jl:1631 [inlined]
  [7] compact!(code::Core.Compiler.IRCode, allow_cfg_transforms::Bool)
    @ Core.Compiler ./compiler/ssair/ir.jl:1896
...