Bug #79376 [Fbk]: Clone is enforcing copy-on-write on some properties in large app

Edit report at https://bugs.php.net/bug.php?id=79376&edit=1 ID: 79376 Updated by: requinix@php.net Reported by: michael dot vorisek at email dot cz Summary: Clone is enforcing copy-on-write on some properties in large app Status: Feedback Type: Bug Package: Scripting Engine problem Operating System: Linux PHP Version: 7.4.3 Block user comment: N Private report: N New Comment: Sounds like elements is/was a reference. Previous Comments: ------------------------------------------------------------------------ [2020-03-13 00:47:04] levim@php.net Is the object in question using inheritance, and if so is the parent an internal class? ------------------------------------------------------------------------ [2020-03-13 00:30:07] michael dot vorisek at email dot cz Description: ------------ After tens of hours I have isolated an issue where setting one property sets the same property of the same class of different instance (verified by objects hashes). I finally managed to fix the issue by the following code: public function __clone() { $elems = $this->elements; unset($this->elements); $this->elements = $elems; ... } I was not able to isolate this issue to short test code. Please confirm, that the following code is normally never needed if the "elements" property is an array and please check the source of PHP briefly for this issue. I have full access to the server so I can test anything. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79376&edit=1