terminfo parser: extendedterminfo() results in conversion error for TERM=screen-256color

[tkemmer]

I just noticed that current Julia 1.11-dev's REPL throws a conversion error on startup for TERM=screen-256color (ncurses 6.4) on my Gentoo system:

ERROR: MethodError: Cannot `convert` an object of type 
  UInt32 to an object of type 
  Union{Bool, Int64, String}

Closest candidates are:
  convert(::Type{T}, !Matched::T) where T
   @ Base Base.jl:84

Stacktrace:
  [1] setindex!(h::Dict{Symbol, Union{Bool, Int64, String}}, v0::UInt32, key::Symbol)
    @ Base ./dict.jl:374
  [2] Dict{Symbol, Union{Bool, Int64, String}}(kv::Vector{Pair{Symbol}})
    @ Base ./dict.jl:84
  [3] extendedterminfo(data::IOStream; NumInt::Type{UInt32})
    @ Base ./terminfo.jl:145
  [4] read(data::IOStream, ::Type{Base.TermInfoRaw})
    @ Base ./terminfo.jl:110
  [5] #440
    @ Base ./io.jl:486 [inlined]
  [6] open(f::Base.var"#440#441"{Base.TermInfoRaw}, args::String; kwargs::@Kwargs{})
    @ Base ./io.jl:396
  [7] open
    @ Base ./io.jl:393 [inlined]
  [8] read
    @ Base ./io.jl:486 [inlined]
  [9] load_terminfo(term::String)
    @ Base ./terminfo.jl:241
 [10] (::Base.var"#1041#1043"{Bool, Symbol, Bool})(REPL::Module)
    @ Base ./client.jl:407
 [11] #invokelatest#2
    @ Base ./essentials.jl:895 [inlined]
 [12] invokelatest
    @ Base ./essentials.jl:892 [inlined]
 [13] run_main_repl(interactive::Bool, quiet::Bool, banner::Symbol, history_file::Bool, color_set::Bool)
    @ Base ./client.jl:405
 [14] main(ARGS::Any)
    @ REPL /usr/lib64/julia-latest/share/julia/stdlib/v1.11/REPL/src/REPL.jl:1522
 [15] _start()
    @ Base ./client.jl:552

This does not seem to be the same issue as #51110 but rather a problem with the way the return value of extendedterminfo() is constructed [1] (since #50797). The involved dictionary expects a value of type Union{Bool, Int, String} and tries to convert the elements of the numbers array (either UInt16 or UInt32, depending on the function's NumInt parameter) accordingly.

[1] https://github.com/JuliaLang/julia/blame/master/base/terminfo.jl#L145-L146

versioninfo()

Julia Version 1.11.0-DEV.405
Commit fc2f997303e (2023-09-05 08:57 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 8 × Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
  WORD_SIZE: 64
  LLVM: libLLVM-15.0.7 (ORCJIT, skylake)
  Threads: 1 on 8 virtual cores

MWE

TERM=screen-256color julia

screen-256color.zip