julia> struct Printable
            self::Any
            show::Core.OpaqueClosure{Tuple{Base.TTY, Any}, Nothing}

            Printable(self::T) where T = new(self,
                #= show =# Base.Experimental.@opaque (io::Base.TTY, @nospecialize(self::Any))->show(io, self::T)::Nothing
            )
       end

julia> Printable(1)
Internal error: during type inference of
(::Type{Main.Printable})(Int64)
Encountered unexpected error in runtime:
BoundsError(a=Array{Core.Compiler.VarState, 1}(dims=(0,), mem=Memory{Core.Compiler.VarState}(0, 0x7f2d2f80df70)[]), i=(1,))
throw_boundserror at ./essentials.jl:14
getindex at ./essentials.jl:891 [inlined]
stmt_effect_flags at ./compiler/optimize.jl:312
recompute_effects_flags at ./compiler/optimize.jl:381 [inlined]
add_inst_flag! at ./compiler/ssair/inlining.jl:1216 [inlined]
add_inst_flag! at ./compiler/ssair/inlining.jl:1213 [inlined]
process_simple! at ./compiler/ssair/inlining.jl:1243
assemble_inline_todo! at ./compiler/ssair/inlining.jl:1614
ssa_inlining_pass! at ./compiler/ssair/inlining.jl:80 [inlined]
run_passes_ipo_safe at ./compiler/optimize.jl:968
run_passes_ipo_safe at ./compiler/optimize.jl:983 [inlined]
optimize at ./compiler/optimize.jl:957
jfptr_optimize_40222.1 at /home/topolarity/dist/julia-cedar/vanilla/latest/lib/julia/sys.so (unknown line)
_jl_invoke at /build/julia/src/gf.c:2994 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
_typeinf at ./compiler/typeinfer.jl:253
typeinf at ./compiler/typeinfer.jl:215
jfptr_typeinf_37232.1 at /home/topolarity/dist/julia-cedar/vanilla/latest/lib/julia/sys.so (unknown line)
typeinf_edge at ./compiler/typeinfer.jl:863
abstract_call_method at ./compiler/abstractinterpretation.jl:655
abstract_call_opaque_closure at ./compiler/abstractinterpretation.jl:2217
abstract_eval_statement_expr at ./compiler/abstractinterpretation.jl:2575
abstract_eval_statement at ./compiler/abstractinterpretation.jl:2775
abstract_eval_basic_statement at ./compiler/abstractinterpretation.jl:3062
typeinf_local at ./compiler/abstractinterpretation.jl:3340
typeinf_nocycle at ./compiler/abstractinterpretation.jl:3422
_typeinf at ./compiler/typeinfer.jl:235
typeinf at ./compiler/typeinfer.jl:215
typeinf_ext at ./compiler/typeinfer.jl:1121
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1179 [inlined]
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1177
jfptr_typeinf_ext_toplevel_37476.1 at /home/topolarity/dist/julia-cedar/vanilla/latest/lib/julia/sys.so (unknown line)
_jl_invoke at /build/julia/src/gf.c:2994 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
jl_apply at /build/julia/src/julia.h:2185 [inlined]
jl_type_infer at /build/julia/src/gf.c:393
jl_compile_method_internal at /build/julia/src/gf.c:2559
_jl_invoke at /build/julia/src/gf.c:2986 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
jl_apply at /build/julia/src/julia.h:2185 [inlined]
do_call at /build/julia/src/interpreter.c:126
eval_value at /build/julia/src/interpreter.c:223
eval_stmt_value at /build/julia/src/interpreter.c:174 [inlined]
eval_body at /build/julia/src/interpreter.c:659
jl_interpret_toplevel_thunk at /build/julia/src/interpreter.c:829
top-level scope at REPL[2]:1
jl_toplevel_eval_flex at /build/julia/src/toplevel.c:953
__repl_entry_eval_expanded_with_loc at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:220
toplevel_eval_with_hooks at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:227
toplevel_eval_with_hooks at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:231
toplevel_eval_with_hooks at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:224 [inlined]
eval_user_input at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:249
repl_backend_loop at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:358
#start_repl_backend#59 at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:343
start_repl_backend at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:340
_jl_invoke at /build/julia/src/gf.c:2994 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
#run_repl#72 at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:499
run_repl at /home/topolarity/dist/julia-cedar/vanilla/latest/share/julia/stdlib/v1.12/REPL/src/REPL.jl:485
unknown function (ip: 0x7f2d4cf05cd6)
_jl_invoke at /build/julia/src/gf.c:2994 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
#1159 at ./client.jl:448
jfptr_YY.1159_16939 at /home/topolarity/.julia/compiled/v1.12/REPL/u0gqU_rt7eL.so (unknown line)
_jl_invoke at /build/julia/src/gf.c:2994 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
jl_apply at /build/julia/src/julia.h:2185 [inlined]
jl_f__call_latest at /build/julia/src/builtins.c:875
#invokelatest#2 at ./essentials.jl:1030 [inlined]
invokelatest at ./essentials.jl:1027 [inlined]
run_main_repl at ./client.jl:432
repl_main at ./client.jl:569 [inlined]
_start at ./client.jl:543
jfptr__start_69785.1 at /home/topolarity/dist/julia-cedar/vanilla/latest/lib/julia/sys.so (unknown line)
_jl_invoke at /build/julia/src/gf.c:2994 [inlined]
ijl_apply_generic at /build/julia/src/gf.c:3171
jl_apply at /build/julia/src/julia.h:2185 [inlined]
true_main at /build/julia/src/jlapi.c:900
jl_repl_entrypoint at /build/julia/src/jlapi.c:1059
main at /build/julia/cli/loader_exe.c:58
unknown function (ip: 0x7f2d5861cd8f)
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x4010b8)