[Issue 20270] [REG2.087] Deadlock in garbage collection when running processes in parallel

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20270

--- Comment #5 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
(In reply to Rainer Schuetze from comment #3)
> I cannot reproduce locally in a VM.

>From experimenting with taskset, it seems that there need to be at least 5
physical cores to run threads on for this bug to be reproduced. (Does not
reproduce with `taskset f` but does reproduce with `taskset 1f`.)

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