crash in showing source code

[vtjnash]

julia> using Cthulhu

julia> descend(Base._tuple_unique_fieldtypes, (Any,))
_tuple_unique_fieldtypes(t) @ Base tuple.jl:212
212 function _tuple_unique_fieldtypes(@nospecialize t::Any)::Core.SimpleVector
213     @_total_meta
214     types::Base.IdSet{Any} = IdSet::Type{Base.IdSet}()::Base.IdSet{Any}
215     t´::Any = unwrap_unionall(t::Any)::Any
216     # Given t = Tuple{Vararg{S}} where S<:Real, the various
217     # unwrapping/wrapping/va-handling here will return Real
218     if (t´::Any isa Union)::Bool
219         union!(types::Base.IdSet{Any}, _tuple_unique_fieldtypes(rewrap_unionall(t´::Any.a::Any, t::Any)::Any)::Core.SimpleVector)
220         union!(types::Base.IdSet{Any}, _tuple_unique_fieldtypes(rewrap_unionall(t´::Any.b::Any, t::Any)::Any)::Core.SimpleVector)
221     else
222         for ti::Any in (ERROR: BoundsError: attempt to access Core.SimpleVector at index [1]
Stacktrace:
  [1] getindex(v::Core.SimpleVector, i::Int64)
    @ Base ./essentials.jl:769
  [2] type_annotation_mode(node::JuliaSyntax.TreeNode{TypedSyntax.TypedSyntaxData}, T::Any; type_annotations::Bool, hide_type_stable::Bool)
    @ TypedSyntax ~/.julia/dev/Cthulhu/TypedSyntax/src/show.jl:104
  [3] type_annotation_mode
    @ TypedSyntax ~/.julia/dev/Cthulhu/TypedSyntax/src/show.jl:97 [inlined]
  [4] show_src_expr(io::IOContext{Base.TTY}, node::JuliaSyntax.TreeNode{TypedSyntax.TypedSyntaxData}, position::Int64, pre::String, pre2::String; type_annotations::Bool, iswarn::Bool, hide_type_stable::Bool, nd::Int64)
    @ TypedSyntax ~/.julia/dev/Cthulhu/TypedSyntax/src/show.jl:79
  [5] show_src_expr(io::IOContext{Base.TTY}, node::JuliaSyntax.TreeNode{TypedSyntax.TypedSyntaxData}, position::Int64, pre::String, pre2::String; type_annotations::Bool, iswarn::Bool, hide_type_stable::Bool, nd::Int64) (repeats 5 times)
    @ TypedSyntax ~/.julia/dev/Cthulhu/TypedSyntax/src/show.jl:80
  [6] show_src_expr
    @ TypedSyntax ~/.julia/dev/Cthulhu/TypedSyntax/src/show.jl:66 [inlined]
  [7] printstyled(io::IOContext{Base.TTY}, rootnode::JuliaSyntax.TreeNode{TypedSyntax.TypedSyntaxData}; type_annotations::Bool, iswarn::Bool, hide_type_stable::Bool, with_linenumber::Bool, idxend::Int64)
    @ TypedSyntax ~/.julia/dev/Cthulhu/TypedSyntax/src/show.jl:50
  [8] cthulhu_typed(io::IOContext{…}, debuginfo::Symbol, src::CodeInfo, rt::Any, effects::Core.Compiler.Effects, mi::MethodInstance; iswarn::Bool, hide_type_stable::Bool, optimize::Bool, pc2remarks::Nothing, pc2effects::Nothing, inline_cost::Bool, type_annotations::Bool, annotate_source::Bool, inlay_types_vscode::Bool, diagnostics_vscode::Bool, interp::Cthulhu.CthulhuInterpreter)
    @ Cthulhu ~/.julia/dev/Cthulhu/src/codeview.jl:168
  [9] cthulhu_typed(::IOContext{…}, ::Cthulhu.DInfo.DebugInfo, ::CodeInfo, ::Vararg{…}; kwargs::@Kwargs{…})
    @ Cthulhu ~/.julia/dev/Cthulhu/src/codeview.jl:121
 [10] 
    @ Cthulhu ~/.julia/dev/Cthulhu/src/Cthulhu.jl:498
 [11] _descend(term::REPL.Terminals.TTYTerminal, interp::Cthulhu.CthulhuInterpreter, mi::MethodInstance; kwargs::@Kwargs{iswarn::Bool})
    @ Cthulhu ~/.julia/dev/Cthulhu/src/Cthulhu.jl:739
 [12] _descend(term::REPL.Terminals.TTYTerminal, args::Any; interp::Core.Compiler.NativeInterpreter, kwargs::@Kwargs{iswarn::Bool})
    @ Cthulhu ~/.julia/dev/Cthulhu/src/Cthulhu.jl:755
 [13] __descend_with_error_handling(args::Any; terminal::Any, kwargs...)
    @ Cthulhu ~/.julia/dev/Cthulhu/src/Cthulhu.jl:211
 [14] _descend_with_error_handling(f::Any, argtypes::Any; kwargs::@Kwargs{iswarn::Bool})
    @ Cthulhu ~/.julia/dev/Cthulhu/src/Cthulhu.jl:200
 [15] descend_code_typed(::Any, ::Vararg{Any}; kwargs::@Kwargs{})
    @ Cthulhu ~/.julia/dev/Cthulhu/src/Cthulhu.jl:158
 [16] top-level scope
    @ REPL[14]:1
Some type information was truncated. Use `show(err)` to see complete types.

[Zentrik]

#491 related, both of these are due to T.parameters[1] being used to get the inside of Type{...} (T = Type{...}).