`@time` in global while loop causes internal error

[KristofferC]

julia> while true
           @time 1
       end
Internal error: encountered unexpected error in runtime:
BoundsError(a=Array{Core.Compiler.BasicBlock, (10,)}[Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=1, stop=8), preds=Array{Int64, (1,)}[10], succs=Array{Int64, (1,)}[2]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=9, stop=14), preds=Array{Int64, (1,)}[1], succs=Array{Int64, (2,)}[5, 3]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=15, stop=17), preds=Array{Int64, (1,)}[2], succs=Array{Int64, (1,)}[4]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=18, stop=18), preds=Array{Int64, (1,)}[3], succs=Array{Int64, (1,)}[7]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=19, stop=24), preds=Array{Int64, (1,)}[2], succs=Array{Int64, (1,)}[6]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=25, stop=25), preds=Array{Int64, (1,)}[5], succs=Array{Int64, (1,)}[7]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=26, stop=42), preds=Array{Int64, (2,)}[4, 6], succs=Array{Int64, (2,)}[9, 8]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=43, stop=44), preds=Array{Int64, (1,)}[7], succs=Array{Int64, (0,)}[]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=45, stop=72), preds=Array{Int64, (1,)}[7], succs=Array{Int64, (1,)}[10]), Core.Compiler.BasicBlock(stmts=Core.Compiler.StmtRange(start=73, stop=77), preds=Array{Int64, (1,)}[9], succs=Array{Int64, (1,)}[1])], i=(0,))
ijl_bounds_error_ints at /home/kc/julia/src/rtutils.c:194
getindex at ./essentials.jl:13 [inlined]
getindex at ./abstractarray.jl:1263 [inlined]
replace_code_newstyle! at ./compiler/ssair/legacy.jl:89
ir_to_codeinf! at ./compiler/optimize.jl:154 [inlined]
transform_result_for_cache at ./compiler/typeinfer.jl:364 [inlined]
cache_result! at ./compiler/typeinfer.jl:395
_typeinf at ./compiler/typeinfer.jl:277
typeinf at ./compiler/typeinfer.jl:213
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1073
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1060
jfptr_typeinf_ext_toplevel_18438 at /home/kc/julia/usr/lib/julia/sys.so (unknown line)

Seems to have been introduced in 1.7.

[vtjnash]

I think @ianatol had looked into this a few times, and was just deciding how to best fix this?

[ianatol]

Ref: #37154

I haven't really worked on it since last year, but happy to check it out soon

[inkydragon]

versioninfo()
while true
    @time 1
end

• ✔️ 1.6.4 (2021-11-19)
• ✔️ 1.7.0-rc1 (2021-09-12)
• ✔️ 1.7.0-rc1.33 (2021-09-23) cd462dc
• ❌ 1.7.0-rc1.34 (2021-09-23) 8ebf8fd
  Fix bug in @time compilation time measurement, using _tryfinally macro. #41923 ping @NHDaly
• ❌ 1.7.3 (2022-05-06)
• ❌ 1.8.0-rc4 (2022-08-08)
• ❌ 1.9.0-DEV.1125 (2022-08-13)

[NHDaly]

CC: @IanButterworth alas, this will never end.

Thanks for the careful report, @inkydragon! @IanButterworth: do you have any ideas? That PR was mostly just reopening your old PR; I don't immediately see anything wrong.