[pull] main from python:main#839
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pull[bot] merged 13 commits intotj-python:mainfrom Mar 9, 2026
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…connection_lost()` (#145554)
Return the same object unmodified if it's exactly the frozendict type. Optimize also PyFrozenDict_New(frozendict).
…xample (#141620) --------- Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
Fix three issues that caused mimalloc pages to be leaked until the owning thread exited: 1. In _PyMem_mi_page_maybe_free(), move pages out of the full queue when relying on QSBR to defer freeing the page. Pages in the full queue are never searched by mi_page_queue_find_free_ex(), so a page left there is unusable for allocations. 2. Move _PyMem_mi_page_clear_qsbr() from _mi_page_free_collect() to _mi_page_thread_free_collect() where it only fires when all blocks on the page are free (used == 0). The previous placement was too broad: it cleared QSBR state whenever local_free was non-NULL, but _mi_page_free_collect() is called from non-allocation paths (e.g., page visiting in mi_heap_visit_blocks) where the page is not being reused. 3. In _PyMem_mi_page_maybe_free(), use the page's heap tld to find the correct thread state for QSBR list insertion instead of PyThreadState_GET(). During stop-the-world pauses, the function may process pages belonging to other threads, so the current thread state is not necessarily the owner of the page.
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