STINNER Victor <vstin...@python.org> added the comment:
The _sre crash has a complex history in the 3.9 branch:
* (1) 2019-11-20, commit 7247407c35330f3f6292f1d40606b7ba6afd5700: first CRASH!
The parent commit (488d02a24142948bfb1fafd19fa48e61fcbbabc5) doesn't crash.
* (2) 2019-11-22, commit 82c83bd907409c287a5bd0d0f4598f2c0538f34d: no crash
(fix/workaround the crash)
* (3) 2021-10-05, commit 52d9d3b75441ae6038fadead89eac5eecdd34501: crash again!
(somehow revert the previous fix/workaround the crash, but fix another bug)
It seems like the initial regression comes from this change:
commit 7247407c35330f3f6292f1d40606b7ba6afd5700
Author: Victor Stinner <vstin...@python.org>
Date: Wed Nov 20 12:25:50 2019 +0100
bpo-36854: Move _PyRuntimeState.gc to PyInterpreterState (GH-17287)
* Rename _PyGC_InitializeRuntime() to _PyGC_InitState()
* finalize_interp_clear() now also calls _PyGC_Fini() in
subinterpreters (clear the GC state).
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue46070>
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