Fixed GH-19860: Increment `BG(serialize_lock)` if `unserialize()` is called while an unserialize operation is in progress.#19883

Draft

SakiTakamachi wants to merge 2 commits intophp:PHP-8.3from

SakiTakamachi:fix/gh19860

Commits on Sep 19, 2025

Added a test
SakiTakamachi
committed
Increment `BG(serialize_lock)` if `unserialize()` is called while an unserialize operation is in progress.
SakiTakamachi
committed