CI failure when testing sending arrays

Observed this failure on the OSX test for #112: ```julia Testing Running tests... Test Failed at /Users/runner/work/Distributed.jl/Distributed.jl/test/distributed_exec.jl:409 Expression: a == remotecall_fetch((x->begin #= /Users/runner/work/Distributed.jl/Distributed.jl/test/distributed_exec.jl:409 =# x end), id_other, a) Evaluated: [0.5946357748689605, 0.7048341678636187, 0.9572888290215604, 0.18264029042455987, 0.4384192573227691, 0.22157930479824584, 0.4315750395313456, 0.4425032613947064, 0.37243488252060664, 0.5397596313913603 … 0.5294886907150608, 0.9330856005741858, 0.45975178468362765, 0.8296207877110172, 0.9851407263085724, 0.9853470888125861, 0.9571076854720877, 0.35202745408110114, 0.35773654285097367, 0.9171232230632897] == [0.5946357748689605, 0.7048341678636187, 0.9572888290215604, 0.18264029042455987, 0.4384192573227691, 0.22157930479824584, 0.4315750395313456, 0.4425032613947064, 0.37243488252060664, 0.5397596313913603 … 0.5294886907150608, 0.9330856005741858, 0.45975178468362765, 0.8296207877110172, 0.9851407263085724, 0.9853470888125861, 0.9571076854720877, 0.35202745408110114, 0.35773654285097367, 0.9171232230632897] Test Failed at /Users/runner/work/Distributed.jl/Distributed.jl/test/distributed_exec.jl:419 Expression: [fetch(rr) for rr = rr_list] == [:OK for x = 1:ntasks] Evaluated: [:OK, :OK, :ERROR, :OK, :OK, :OK, :OK, :OK, :OK, :OK] == [:OK, :OK, :OK, :OK, :OK, :OK, :OK, :OK, :OK, :OK] ERROR: LoadError: There was an error during testing in expression starting at /Users/runner/work/Distributed.jl/Distributed.jl/test/distributed_exec.jl:419 ERROR: LoadError: Distributed test failed, cmd : `/Users/runner/hostedtoolcache/julia/nightly/x64/bin/julia -C native -J/Users/runner/hostedtoolcache/julia/nightly/x64/lib/julia/sys.dylib -g1 --code-coverage=@/Users/runner/work/Distributed.jl/Distributed.jl --color=yes --startup-file=no --check-bounds=yes --startup-file=no --depwarn=error /Users/runner/work/Distributed.jl/Distributed.jl/test/distributed_exec.jl` Stacktrace: [1] error(s::String) @ Base ./error.jl:44 [2] top-level scope @ ~/work/Distributed.jl/Distributed.jl/test/runtests.jl:11 [3] include(mapexpr::Function, mod::Module, _path::String) @ Base ./Base.jl:301 [4] top-level scope @ none:6 [5] eval(m::Module, e::Any) @ Core ./boot.jl:461 [6] exec_options(opts::Base.JLOptions) @ Base ./client.jl:295 [7] _start() @ Base ./client.jl:558 in expression starting at /Users/runner/work/Distributed.jl/Distributed.jl/test/runtests.jl:10 Package Distributed errored during testing ```