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Title: gh-151119: Sync eval stack in LIST_APPEND on allocation failure by bhuvi27 · Pull Request #151538 · python/cpython · GitHub

Open Graph Title: gh-151119: Sync eval stack in LIST_APPEND on allocation failure by bhuvi27 · Pull Request #151538 · python/cpython

X Title: gh-151119: Sync eval stack in LIST_APPEND on allocation failure by bhuvi27 · Pull Request #151538 · python/cpython

Description: Fix a debug-build abort when LIST_APPEND fails to resize a list under simulated memory pressure (_testcapi.set_nomemory). Drop _PyList_AppendTakeRef from NON_ESCAPING_FUNCTIONS so the cases generator emits stack pointer save/restore around it, same as SET_ADD. Add test_list_append_nomemory_debug regression test. Fixes #151119 Issue: gh-151119

Open Graph Description: Fix a debug-build abort when LIST_APPEND fails to resize a list under simulated memory pressure (_testcapi.set_nomemory). Drop _PyList_AppendTakeRef from NON_ESCAPING_FUNCTIONS so the cases generat...

X Description: Fix a debug-build abort when LIST_APPEND fails to resize a list under simulated memory pressure (_testcapi.set_nomemory). Drop _PyList_AppendTakeRef from NON_ESCAPING_FUNCTIONS so the cases generat...

Opengraph URL: https://github.com/python/cpython/pull/151538

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c4eb3b3 gh-151119: Sync eval stack in LIST_APPEND on allocation failure bhuvi27 Jun 16, 2026 https://github.com/python/cpython/pull/151538/commits/c4eb3b34c2ed0f934c7c89918fbc4dd16715a48f
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