[Bug 255445] lang/python 3.8/3.9 SIGSEV core dumps in libthr TrueNAS

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255445

--- Comment #18 from yocalebo at gmail.com <yocalebo at gmail.com> ---
(In reply to Victor Stinner from comment #17)

Thanks for the tips and the links to your notes. However, the panics are still
happening on py3.9.4. Unfortunately, I've analyzed 11 core dumps at this point.
10 from py3.8 and 1 from py3.9.4. All of their tstate has a reference to
lxml.etree._ParserDictionaryContext. I actually just analyzed a multiprocessing
core dump and it is panic'ing during garbage collection (visit_decref) but the
story is the same. _ParserDictionaryContext is in the thread at time of dump.

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