Segfault in ijl_isa when giving two return types in function assignment when function already exists

[xal-0]

Found while trying to write a grammar for assignment, on 29da86b:

julia> f() = 1
f (generic function with 1 method)

julia> f()::Int::Int = 1

[67863] signal 11 (2): Segmentation fault: 11
in expression starting at REPL[2]:1
ijl_isa at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/subtype.c:2443
jl_f_typeassert at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/builtins.c:571
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/./julia.h:2303 [inlined]
do_call at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/interpreter.c:124
eval_stmt_value at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/interpreter.c:193
eval_body at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/interpreter.c:688
jl_interpret_toplevel_thunk at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/interpreter.c:897
jl_toplevel_eval_flex at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/toplevel.c:1034
__repl_entry_eval_expanded_with_loc at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:340
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/./julia.h:2303 [inlined]
jl_f__call_latest at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/builtins.c:883
#invokelatest#1 at ./essentials.jl:1057 [inlined]
invokelatest at ./essentials.jl:1053 [inlined]
toplevel_eval_with_hooks at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:347
toplevel_eval_with_hooks at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:351
toplevel_eval_with_hooks at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:344 [inlined]
eval_user_input at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:369
repl_backend_loop at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:481
#start_repl_backend#41 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:466
start_repl_backend at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:463 [inlined]
#run_repl#48 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:689
run_repl at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:675
jfptr_run_repl_20739.1 at /Users/user/.julia/juliaup/julia-nightly/share/julia/compiled/v1.13/REPL/u0gqU_GCzCT.dylib (unknown line)
run_std_repl at ./client.jl:488
jfptr_run_std_repl_60754.1 at /Users/user/.julia/juliaup/julia-nightly/lib/julia/sys.dylib (unknown line)
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/./julia.h:2303 [inlined]
jl_f__call_latest at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/builtins.c:883
#invokelatest#1 at ./essentials.jl:1057 [inlined]
invokelatest at ./essentials.jl:1053 [inlined]
run_main_repl at ./client.jl:509
repl_main at ./client.jl:596 [inlined]
_start at ./client.jl:571
jfptr__start_59973.1 at /Users/user/.julia/juliaup/julia-nightly/lib/julia/sys.dylib (unknown line)
jl_apply at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/./julia.h:2303 [inlined]
true_main at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/jlapi.c:964
jl_repl_entrypoint at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-HL2F7YQ3XH.0/build/default-honeycrisp-HL2F7YQ3XH-0/julialang/julia-master/src/jlapi.c:1124
Allocations: 1 (Pool: 1; Big: 0); GC: 0

Works at least back to 1.7.

[xal-0]

Parses as:

(= (:: (:: (call f) Int) Int) (block (line 1 none) 1))

Lowered:

1 ─ %1 = Main.f
│          dynamic (%1)()
│   %3 = Main.Int
│   %4 =   dynamic Core.typeassert(%9, %3)
│   %5 = Main.Int
│          dynamic Core.typeassert(%4, %5)
│   %7 = Main.Int
│          dynamic Core.typeassert(%9, %7)
│   @ none:1 within `unknown scope`
│   %9 = 1
└──      return 1

[gbaraldi]

By work here do you mean it doesn't work, because this crashes from at least 1.6 and onwards