Specifying type for list comprehension sometimes crashes Julia

Specifying type for list comprehension sometimes causes an unexpected runtime error that sometimes crashes Julia. This is a heightened version of #1343 because it breaks Julia rather than throwing an error. Reproduction is a bit finicky (probably because the Julia runtime is broken) but I consistently get a dire error of some sort when I run this as the first thing in a REPL session after loading Zygote. The error is present on both 1.8.4 and 1.9.0-alpha1.

gradient(1) do x
    v = eltype(x)[i for i in x]
    only(v)
end

x@X ~ % julia +alpha
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _' |  |
  | | |_| | | | (_| |  |  Version 1.9.0-alpha1 (2022-11-15)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

(@v1.9) pkg> activate @Zygote
  Activating project at `~/.julia/environments/Zygote`

(@Zygote) pkg> status
Status `~/.julia/environments/Zygote/Project.toml`
  [e88e6eb3] Zygote v0.6.51

julia> using Zygote

julia> gradient(1) do x
           v = eltype(x)[i for i in x]
           only(v)
       end
Internal error: encountered unexpected error in runtime:
BoundsError(a=Array{Core.Compiler.VarState, (2,)}[Core.Compiler.VarState(typ=Zygote.Pullback{Tuple{typeof(Base.Iterators.only), Array{Int64, 0}}, Any}, undef=false), Core.Compiler.VarState(typ=Int64, undef=false)], i=(3,))
ijl_bounds_error_ints at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
setindex! at ./array.jl:969 [inlined]
stoverwrite1! at ./compiler/typelattice.jl:599
typeinf_local at ./compiler/abstractinterpretation.jl:2712
typeinf_nocycle at ./compiler/abstractinterpretation.jl:2811
_typeinf at ./compiler/typeinfer.jl:244
typeinf at ./compiler/typeinfer.jl:215
typeinf_ext at ./compiler/typeinfer.jl:1074
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1107
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1103
jfptr_typeinf_ext_toplevel_18850.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_type_infer at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_generate_fptr_impl at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
jl_compile_method_internal at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
Pullback at ./REPL[4]:3 [inlined]
Pullback at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface2.jl:0
#60 at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:45
unknown function (ip: 0x1176ce6a5)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
gradient at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:97
unknown function (ip: 0x115bec549)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
do_call at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
eval_body at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_interpret_toplevel_thunk at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
top-level scope at REPL[4]:1
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ijl_toplevel_eval_in at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
eval at ./boot.jl:370 [inlined]
eval_user_input at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:152
repl_backend_loop at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:248
#start_repl_backend#46 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:233
start_repl_backend at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:230 [inlined]
#run_repl#59 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:376
run_repl at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:362
jfptr_run_repl_58109.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
#1016 at ./client.jl:421
jfptr_YY.1016_37092.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_f__call_latest at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
#invokelatest#2 at ./essentials.jl:816 [inlined]
invokelatest at ./essentials.jl:813 [inlined]
run_main_repl at ./client.jl:405
exec_options at ./client.jl:322
_start at ./client.jl:522
jfptr__start_48720.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
true_main at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_repl_entrypoint at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ERROR: Mutating arrays is not supported -- called setindex!(Array{Int64, 0}, ...)
This error occurs when you ask Zygote to differentiate operations that change
the elements of arrays in place (e.g. setting values with x .= ...)

Possible fixes:
- avoid mutating operations (preferred)
- or read the documentation and solutions for this error
  https://fluxml.ai/Zygote.jl/latest/limitations

Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:35
 [2] _throw_mutation_error(f::Function, args::Array{Int64, 0})
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/lib/array.jl:86
 [3] (::Zygote.var"#389#390"{Array{Int64, 0}})(#unused#::Nothing)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/lib/array.jl:98
 [4] (::Zygote.var"#2509#back#391"{Zygote.var"#389#390"{Array{Int64, 0}}})(Δ::Nothing)
   @ Zygote ~/.julia/packages/ZygoteRules/AIbCs/src/adjoint.jl:67
 [5] Pullback
   @ ./REPL[4]:2 [inlined]
 [6] (::typeof(∂(#3)))(Δ::Int64)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/compiler/interface2.jl:0
 [7] (::Zygote.var"#60#61"{typeof(∂(#3))})(Δ::Int64)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:45
 [8] gradient(f::Function, args::Int64)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:97
 [9] top-level scope
   @ REPL[4]:1

julia> 
x@X ~ % julia +alpha
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _' |  |
  | | |_| | | | (_| |  |  Version 1.9.0-alpha1 (2022-11-15)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

(@v1.9) pkg> activate @Zygote
  Activating project at `~/.julia/environments/Zygote`

(@Zygote) pkg> status
Status `~/.julia/environments/Zygote/Project.toml`
  [e88e6eb3] Zygote v0.6.51

julia> using Zygote

julia> gradient(1) do x
           v = eltype(x)[i for i in x]
           only(v)
       end
Internal error: encountered unexpected error in runtime:
BoundsError(a=Array{Core.Compiler.VarState, (2,)}[Core.Compiler.VarState(typ=Zygote.Pullback{Tuple{typeof(Base.Iterators.only), Array{Int64, 0}}, Any}, undef=false), Core.Compiler.VarState(typ=Int64, undef=false)], i=(3,))
ijl_bounds_error_ints at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
setindex! at ./array.jl:969 [inlined]
stoverwrite1! at ./compiler/typelattice.jl:599
typeinf_local at ./compiler/abstractinterpretation.jl:2712
typeinf_nocycle at ./compiler/abstractinterpretation.jl:2811
_typeinf at ./compiler/typeinfer.jl:244
typeinf at ./compiler/typeinfer.jl:215
typeinf_ext at ./compiler/typeinfer.jl:1074
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1107
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1103
jfptr_typeinf_ext_toplevel_18850.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_type_infer at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_generate_fptr_impl at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
jl_compile_method_internal at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
Pullback at ./REPL[4]:3 [inlined]
Pullback at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface2.jl:0
#60 at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:45
unknown function (ip: 0x11b0f0155)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
gradient at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:97
unknown function (ip: 0x11477efb9)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
do_call at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
eval_body at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_interpret_toplevel_thunk at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
top-level scope at REPL[4]:1
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ijl_toplevel_eval_in at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
eval at ./boot.jl:370 [inlined]
eval_user_input at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:152
repl_backend_loop at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:248
#start_repl_backend#46 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:233
start_repl_backend at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:230 [inlined]
#run_repl#59 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:376
run_repl at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:362
jfptr_run_repl_58109.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
#1016 at ./client.jl:421
jfptr_YY.1016_37092.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_f__call_latest at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
#invokelatest#2 at ./essentials.jl:816 [inlined]
invokelatest at ./essentials.jl:813 [inlined]
run_main_repl at ./client.jl:405
exec_options at ./client.jl:322
_start at ./client.jl:522
jfptr__start_48720.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
true_main at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_repl_entrypoint at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)

[31025] signal (11.1): Segmentation fault: 11
in expression starting at REPL[4]:1
_ZL18convert_julia_typeR12jl_codectx_tRK10jl_cgval_tP11_jl_value_tPPN4llvm5ValueE at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_ZL19emit_varinfo_assignR12jl_codectx_tR12jl_varinfo_t10jl_cgval_tP11_jl_value_t at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_ZL9emit_exprR12jl_codectx_tP11_jl_value_tl at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_ZL18emit_ssaval_assignR12jl_codectx_tlP11_jl_value_t at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_ZL13emit_functionRN4llvm3orc16ThreadSafeModuleEP21_jl_method_instance_tP15_jl_code_info_tP11_jl_value_tR20_jl_codegen_params_t at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_Z12jl_emit_codeRN4llvm3orc16ThreadSafeModuleEP21_jl_method_instance_tP15_jl_code_info_tP11_jl_value_tR20_jl_codegen_params_t at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_Z16jl_emit_codeinstRN4llvm3orc16ThreadSafeModuleEP19_jl_code_instance_tP15_jl_code_info_tR20_jl_codegen_params_t at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
_ZL20_jl_compile_codeinstP19_jl_code_instance_tP15_jl_code_info_tmN4llvm3orc17ThreadSafeContextE at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
jl_generate_fptr_for_unspecialized_impl at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.9.dylib (unknown line)
jl_compile_method_internal at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
Pullback at ./REPL[4]:3 [inlined]
Pullback at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface2.jl:0
#60 at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:45
unknown function (ip: 0x11b0f0155)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
gradient at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:97
unknown function (ip: 0x11477efb9)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
do_call at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
eval_body at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_interpret_toplevel_thunk at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
ijl_toplevel_eval_in at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
eval at ./boot.jl:370 [inlined]
eval_user_input at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:152
repl_backend_loop at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:248
#start_repl_backend#46 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:233
start_repl_backend at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:230 [inlined]
#run_repl#59 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:376
run_repl at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-2.0/build/default-macmini-x64-2-0/julialang/julia-release-1-dot-9/usr/share/julia/stdlib/v1.9/REPL/src/REPL.jl:362
jfptr_run_repl_58109.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
#1016 at ./client.jl:421
jfptr_YY.1016_37092.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_f__call_latest at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
#invokelatest#2 at ./essentials.jl:816 [inlined]
invokelatest at ./essentials.jl:813 [inlined]
run_main_repl at ./client.jl:405
exec_options at ./client.jl:322
_start at ./client.jl:522
jfptr__start_48720.clone_1 at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
true_main at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
jl_repl_entrypoint at /Users/x/.julia/juliaup/julia-1.9.0-alpha1+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.9.dylib (unknown line)
Allocations: 37340056 (Pool: 37320020; Big: 20036); GC: 48
x@X ~ % julia       
               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _' |  |
  | | |_| | | | (_| |  |  Version 1.8.4 (2022-12-23)
 _/ |\__'_|_|_|\__'_|  |  Official https://julialang.org/ release
|__/                   |

(@v1.8) pkg> activate --temp
  Activating new project at `/var/folders/hc/fn82kz1j5vl8w7lwd4l079y80000gn/T/jl_SxFs8t`

julia> using Zygote
 │ Package Zygote not found, but a package named Zygote is available from a registry. 
 │ Install package?
 │   (jl_SxFs8t) pkg> add Zygote 
 └ (y/n/o) [y]: y
    Updating registry at `~/.julia/registries/General.toml`
   Resolving package versions...
    Updating `/private/var/folders/hc/fn82kz1j5vl8w7lwd4l079y80000gn/T/jl_SxFs8t/Project.toml`
  [e88e6eb3] + Zygote v0.6.51
    Updating `/private/var/folders/hc/fn82kz1j5vl8w7lwd4l079y80000gn/T/jl_SxFs8t/Manifest.toml`
  [621f4979] + AbstractFFTs v1.2.1
  [79e6a3ab] + Adapt v3.4.0
  [fa961155] + CEnum v0.4.2
  [082447d4] + ChainRules v1.46.0
  [d360d2e6] + ChainRulesCore v1.15.6
  [9e997f8a] + ChangesOfVariables v0.1.4
  [bbf7d656] + CommonSubexpressions v0.3.0
  [34da2185] + Compat v4.5.0
  [9a962f9c] + DataAPI v1.14.0
  [e2d170a0] + DataValueInterfaces v1.0.0
  [163ba53b] + DiffResults v1.1.0
  [b552c78f] + DiffRules v1.12.2
  [ffbed154] + DocStringExtensions v0.9.3
  [1a297f60] + FillArrays v0.13.6
  [f6369f11] + ForwardDiff v0.10.34
  [0c68f7d7] + GPUArrays v8.5.0
  [46192b85] + GPUArraysCore v0.1.2
  [7869d1d1] + IRTools v0.4.7
  [3587e190] + InverseFunctions v0.1.8
  [92d709cd] + IrrationalConstants v0.1.1
  [82899510] + IteratorInterfaceExtensions v1.0.0
  [692b3bcd] + JLLWrappers v1.4.1
  [929cbde3] + LLVM v4.14.1
  [2ab3a3ac] + LogExpFunctions v0.3.19
  [1914dd2f] + MacroTools v0.5.10
  [77ba4419] + NaNMath v1.0.1
  [bac558e1] + OrderedCollections v1.4.1
  [21216c6a] + Preferences v1.3.0
  [c1ae055f] + RealDot v0.1.0
  [189a3867] + Reexport v1.2.2
  [ae029012] + Requires v1.3.0
  [276daf66] + SpecialFunctions v2.1.7
  [90137ffa] + StaticArrays v1.5.11
  [1e83bf80] + StaticArraysCore v1.4.0
  [09ab397b] + StructArrays v0.6.14
  [3783bdb8] + TableTraits v1.0.1
  [bd369af6] + Tables v1.10.0
  [e88e6eb3] + Zygote v0.6.51
  [700de1a5] + ZygoteRules v0.2.2
  [dad2f222] + LLVMExtra_jll v0.0.16+0
  [efe28fd5] + OpenSpecFun_jll v0.5.5+0
  [0dad84c5] + ArgTools v1.1.1
  [56f22d72] + Artifacts
  [2a0f44e3] + Base64
  [ade2ca70] + Dates
  [8ba89e20] + Distributed
  [f43a241f] + Downloads v1.6.0
  [7b1f6079] + FileWatching
  [b77e0a4c] + InteractiveUtils
  [4af54fe1] + LazyArtifacts
  [b27032c2] + LibCURL v0.6.3
  [76f85450] + LibGit2
  [8f399da3] + Libdl
  [37e2e46d] + LinearAlgebra
  [56ddb016] + Logging
  [d6f4376e] + Markdown
  [ca575930] + NetworkOptions v1.2.0
  [44cfe95a] + Pkg v1.8.0
  [de0858da] + Printf
  [3fa0cd96] + REPL
  [9a3f8284] + Random
  [ea8e919c] + SHA v0.7.0
  [9e88b42a] + Serialization
  [6462fe0b] + Sockets
  [2f01184e] + SparseArrays
  [10745b16] + Statistics
  [fa267f1f] + TOML v1.0.0
  [a4e569a6] + Tar v1.10.1
  [8dfed614] + Test
  [cf7118a7] + UUIDs
  [4ec0a83e] + Unicode
  [e66e0078] + CompilerSupportLibraries_jll v1.0.1+0
  [deac9b47] + LibCURL_jll v7.84.0+0
  [29816b5a] + LibSSH2_jll v1.10.2+0
  [c8ffd9c3] + MbedTLS_jll v2.28.0+0
  [14a3606d] + MozillaCACerts_jll v2022.2.1
  [4536629a] + OpenBLAS_jll v0.3.20+0
  [05823500] + OpenLibm_jll v0.8.1+0
  [83775a58] + Zlib_jll v1.2.12+3
  [8e850b90] + libblastrampoline_jll v5.1.1+0
  [8e850ede] + nghttp2_jll v1.48.0+0
  [3f19e933] + p7zip_jll v17.4.0+0
Precompiling project...
  2 dependencies successfully precompiled in 17 seconds. 46 already precompiled.

julia> gradient(1) do x
           v = eltype(x)[i for i in x]
           only(v)
       end
Internal error: encountered unexpected error in runtime:
BoundsError(a=Array{Core.Compiler.VarState, (2,)}[Core.Compiler.VarState(typ=Zygote.Pullback{Tuple{typeof(Base.Iterators.only), Array{Int64, 0}}, Any}, undef=false), Core.Compiler.VarState(typ=Int64, undef=false)], i=(3,))
ijl_bounds_error_ints at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
setindex! at ./array.jl:966 [inlined]
stupdate! at ./compiler/typelattice.jl:380
typeinf_local at ./compiler/abstractinterpretation.jl:2424
typeinf_nocycle at ./compiler/abstractinterpretation.jl:2482
_typeinf at ./compiler/typeinfer.jl:230
typeinf at ./compiler/typeinfer.jl:213
typeinf_ext at ./compiler/typeinfer.jl:967
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1000
typeinf_ext_toplevel at ./compiler/typeinfer.jl:996
jfptr_typeinf_ext_toplevel_13895.clone_1 at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_type_infer at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_generate_fptr_impl at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-codegen.1.8.dylib (unknown line)
jl_compile_method_internal at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
Pullback at ./REPL[3]:3 [inlined]
Pullback at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface2.jl:0
#60 at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:45
unknown function (ip: 0x11bf4dc65)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
gradient at /Users/x/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:97
unknown function (ip: 0x11a1e8f69)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
do_call at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
eval_body at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_interpret_toplevel_thunk at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
top-level scope at REPL[3]:1
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_toplevel_eval_flex at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
ijl_toplevel_eval_in at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
eval at ./boot.jl:368 [inlined]
eval_user_input at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-4.0/build/default-macmini-x64-4-0/julialang/julia-release-1-dot-8/usr/share/julia/stdlib/v1.8/REPL/src/REPL.jl:151
repl_backend_loop at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-4.0/build/default-macmini-x64-4-0/julialang/julia-release-1-dot-8/usr/share/julia/stdlib/v1.8/REPL/src/REPL.jl:247
start_repl_backend at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-4.0/build/default-macmini-x64-4-0/julialang/julia-release-1-dot-8/usr/share/julia/stdlib/v1.8/REPL/src/REPL.jl:232
#run_repl#47 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-4.0/build/default-macmini-x64-4-0/julialang/julia-release-1-dot-8/usr/share/julia/stdlib/v1.8/REPL/src/REPL.jl:369
run_repl at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-macmini-x64-4.0/build/default-macmini-x64-4-0/julialang/julia-release-1-dot-8/usr/share/julia/stdlib/v1.8/REPL/src/REPL.jl:355
jfptr_run_repl_65470.clone_1 at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
#967 at ./client.jl:419
jfptr_YY.967_47614.clone_1 at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_f__call_latest at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
#invokelatest#2 at ./essentials.jl:729 [inlined]
invokelatest at ./essentials.jl:726 [inlined]
run_main_repl at ./client.jl:404
exec_options at ./client.jl:318
_start at ./client.jl:522
jfptr__start_28650.clone_1 at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/sys.dylib (unknown line)
ijl_apply_generic at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
true_main at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
jl_repl_entrypoint at /Users/x/.julia/juliaup/julia-1.8.4+0.x64.apple.darwin14/lib/julia/libjulia-internal.1.8.dylib (unknown line)
ERROR: Mutating arrays is not supported -- called setindex!(Array{Int64, 0}, ...)
This error occurs when you ask Zygote to differentiate operations that change
the elements of arrays in place (e.g. setting values with x .= ...)

Possible fixes:
- avoid mutating operations (preferred)
- or read the documentation and solutions for this error
  https://fluxml.ai/Zygote.jl/latest/limitations

Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:35
 [2] _throw_mutation_error(f::Function, args::Array{Int64, 0})
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/lib/array.jl:86
 [3] (::Zygote.var"#389#390"{Array{Int64, 0}})(#unused#::Nothing)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/lib/array.jl:98
 [4] (::Zygote.var"#2488#back#391"{Zygote.var"#389#390"{Array{Int64, 0}}})(Δ::Nothing)
   @ Zygote ~/.julia/packages/ZygoteRules/AIbCs/src/adjoint.jl:67
 [5] Pullback
   @ ./REPL[3]:2 [inlined]
 [6] (::typeof(∂(#1)))(Δ::Int64)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/compiler/interface2.jl:0
 [7] (::Zygote.var"#60#61"{typeof(∂(#1))})(Δ::Int64)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:45
 [8] gradient(f::Function, args::Int64)
   @ Zygote ~/.julia/packages/Zygote/SmJK6/src/compiler/interface.jl:97
 [9] top-level scope
   @ REPL[3]:1

julia>