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zend_get_known_property_info treated a ZEND_ACC_CHANGED public property as the known offset even when the executing scope owned a private property of the same name, so tracing JIT wrote through a child's public slot. Returning NULL uses the runtime-cache path, which already goes through zend_get_property_offset. FETCH_OBJ_W, ASSIGN_OBJ, INC, and ASSIGN_OBJ_OP share the helper; $this access, child methods, and unshadowed or protected-to-public properties do not hit this arm. Fixes phpGH-23679
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Opened upstream as php#23683 |
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Tracing JIT specialised $clone->prop writes in a parent method to a child's public property of the same name (ZEND_ACC_CHANGED). zend_get_known_property_info now refuses that known-offset path when the executing scope is not the object's class, so the runtime cache populated by zend_get_property_offset is used instead. FETCH_OBJ_W, ASSIGN_OBJ, INC, and ASSIGN_OBJ_OP share the helper; $this access, child methods, and unshadowed properties do not. Fixes php#23679