Julia 1.1.0 in MacOS: Segmentation fault when calling Dims on large array.

[galanakis]

The following code causes a segmentation fault in a freshly started REPL session.

julia> R=Array{Int64}(undef,32745673)
julia> Dims(R)

The crash output is

signal (11): Segmentation fault: 11
in expression starting at no file:0
unknown function (ip: 0x108b56e62)
jl_fptr_trampoline at /Users/osx/buildbot/slave/package_osx64/build/src/gf.c:1864
eval_user_input at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v1.1/REPL /src/REPL.jl:89
macro expansion at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v1.1/REPL    /src/REPL.jl:117 [inlined]
#26 at ./task.jl:259
jl_apply at /Users/osx/buildbot/slave/package_osx64/build/src/./julia.h:1571 [inlined]
start_task at /Users/osx/buildbot/slave/package_osx64/build/src/task.c:572

Allocations: 1091465 (Pool: 1091121; Big: 344); GC: 7

[Keno]

We should be able to do better, here, but worth pointing out that this is just because this is trying to create a very large tuple, which is not generally something that tuples are designed for, i.e.

R=Array{Int64}(undef,32745673)
tuple(R...)

Segmentation fault: 11

In particular, it tries to allocate a tuple of that size and then runs into a stack overflow that we don't detect because it skips more than one page. We'll need to add stack probing here.

[Keno]

I.e. the action item here is #25523