OutOfMemoryError for Tuple{Vararg{T, N}} where {T} for large N::Int

[nsajko]

I'd expect Julia to be able to handle an UnionAll Vararg like here without trying to expand it. Instead, an OutOfMemoryError is thrown:

julia> struct T{
           N,
           (Tuple{Vararg{T, N}} where {T}) <: Tup <: Tuple,
       }
       end

julia> T{typemax(Int) - 1}
ERROR: OutOfMemoryError()
Stacktrace:
 [1] top-level scope
   @ REPL[2]:1

julia> versioninfo()
Julia Version 1.13.0-DEV.249
Commit bc98abcfbe3 (2025-03-18 05:23 UTC)
Build Info:
  Official https://julialang.org release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 8 × AMD Ryzen 3 5300U with Radeon Graphics
  WORD_SIZE: 64
  LLVM: libLLVM-19.1.7 (ORCJIT, znver2)
  GC: Built with stock GC
Threads: 1 default, 1 interactive, 1 GC (on 8 virtual cores)

[nsajko]

The same happens for T{typemax(Int) - 1, Tuple}.

[nsajko]

Another example:

julia> struct T{
           N,
           Tup <: NTuple{N},
       }
       end

julia> T{typemax(Int) - 1}
ERROR: OutOfMemoryError()
Stacktrace:
 [1] top-level scope
   @ REPL[2]:1

[vtjnash]

Duplicate of #31681