[Bug 54064] ntdll:threadpool - test_tp_io() sometimes fails & crashes in Wine (GitLab CI)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54064

--- Comment #7 from François Gouget  ---
I found it strange that the crash would happen after test_tp_multi_wait()
completes. But TpReleasePool() is asynchronous: it signals the threads to exit
and returns immediately. So there may still be a lot of threads when
test_tp_io() runs.

I don't know how many threads are needed in order for test_tp_multi_wait() to
be meaningful. But maybe another approach would be to minimize their stack size
with something like this:
https://gitlab.winehq.org/wine/wine/-/merge_requests/2133