hvcat error for large, mixed-type matrix literals

[nolta]

$ cat x.jl 
x = [
0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.;
0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.;
0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.;
0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.;
0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.; 0 0.;
0 0.; 0 0.; 0 0.; 0 0.; 
]

$ ./julia -L x.jl 
ERROR: LoadError: UndefVarError: T not defined
hvcat(::NTuple{64,Int64}, ::Int64, ::Vararg{T<:Union{Int64, Float64},N} where N) at ./abstractarray.jl:1516
include_relative(::Module, ::String) at ./loading.jl:464
include at ./sysimg.jl:14 [inlined]
(::Base.Distributed.##145#146{Base.#include,Tuple{Module,String},Array{Any,1}})() at ./distributed/remotecall.jl:332
run_work_thunk(::Base.Distributed.##145#146{Base.#include,Tuple{Module,String},Array{Any,1}}, ::Bool) at ./distributed/process_messages.jl:56
#remotecall_fetch#150(::Array{Any,1}, ::Function, ::Function, ::Base.Distributed.LocalProcess, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:357
remotecall_fetch(::Function, ::Base.Distributed.LocalProcess, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:357
#remotecall_fetch#154(::Array{Any,1}, ::Function, ::Function, ::Int64, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:385
remotecall_fetch(::Function, ::Int64, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:385
(::Base.##530#532{Base.JLOptions})() at ./task.jl:335
while loading /scratch/nolta/julia/x.jl, in expression starting on line 1
#remotecall_fetch#150(::Array{Any,1}, ::Function, ::Function, ::Base.Distributed.LocalProcess, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:358
remotecall_fetch(::Function, ::Base.Distributed.LocalProcess, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:357
#remotecall_fetch#154(::Array{Any,1}, ::Function, ::Function, ::Int64, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:385
remotecall_fetch(::Function, ::Int64, ::Module, ::Vararg{Any,N} where N) at ./distributed/remotecall.jl:385
(::Base.##530#532{Base.JLOptions})() at ./task.jl:335
Stacktrace:
 [1] sync_end() at ./task.jl:287
 [2] macro expansion at ./task.jl:303 [inlined]
 [3] process_options(::Base.JLOptions) at ./client.jl:291
 [4] _start() at ./client.jl:383

A clue: the array has 64 rows. Deleting one row fixes the error.

[fredrikekre]

Likely caused by #23117, since T is not captured here:

julia/base/abstractarray.jl

Line 1512 in aa3d2be

function hvcat(rows::Tuple{Vararg{Int}}, xs::T...) where T<:Number