fix: re-acquire the GIL in class_::init_instance before instance registration - #6172

Merged

rwgk merged 8 commits into

pybind:masterfrom

trim21:fix/gil-scoped-release-init-instance

Sep 15, 2026

Commits on Sep 7, 2026

fix: re-acquire GIL in init_instance for thread-safe instance registration
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1be51f6
tests: avoid std::make_unique in test_gil_scoped (C++14 only)
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629e35b
tests: skip test_init_factory_gil_released_concurrent_construction on free-threaded builds
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19d242b
tests: run the init_instance race regression only as a direct test
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580a8c6
chore: retrigger CI (GCC 9 job failed on apt 404 for python3-setuptools, unrelated)
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e4402e4

Commits on Sep 13, 2026

fix: make init_instance GIL acquisition unconditional
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d59f5db
test: run init_instance regression on free-threaded builds too
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a6c286a

Commits on Sep 14, 2026

docs: cover free-threaded thread-state attach in init_instance comments
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1b0df99