threaded test fails on windows

[ArnoStrouwen]

This line hangs indefinitely on my windows machine:
https://github.com/SciML/RuntimeGeneratedFunctions.jl/blob/master/test/runtests.jl#L133
but seems to work fine on linux CI

[ArnoStrouwen]

Cannot be reproduced on windows CI either.

[vinhpb]

Hi,
I have encountered a seemingly similar issue when trying to do @RuntimeGeneratedFunction in multithreading mode on my Windows computer. I would really appreciate it if you could show me any workaround.