Bug #79364 [Opn->Csd]: When copy empty array, next key is unspecified.

Edit report at https://bugs.php.net/bug.php?id=79364&edit=1 ID: 79364 Updated by: cmb@php.net Reported by: yuubiseiharukana at gmail dot com Summary: When copy empty array, next key is unspecified. -Status: Open +Status: Closed Type: Bug Package: Arrays related Operating System: Any PHP Version: 7.4.3 Block user comment: N Private report: N New Comment: Automatic comment on behalf of cmbecker69@gmx.de Revision: http://git.php.net/?p=php-src.git;a=commit;h=2462f2dab185f53544f2c5335ba6c16a007f3c71 Log: Fix #79364: When copy empty array, next key is unspecified Previous Comments: ------------------------------------------------------------------------ [2020-03-10 15:18:18] cmb@php.net The following pull request has been associated: Patch Name: Fix #79364: When copy empty array, next key is unspecified On GitHub: https://github.com/php/php-src/pull/5253 Patch: https://github.com/php/php-src/pull/5253.patch ------------------------------------------------------------------------ [2020-03-10 14:38:28] yuubiseiharukana at gmail dot com Description: ------------ Copy array. When arrays next index=2 and max key=2, next key is both 2. When arrays next index=2 and max key=1, next key is both 2. When arrays next index=2 and max key=0, next key is 0 or 2. Test script: --------------- https://3v4l.org/TYc10 $a = [1, 2]; unset($a[1], $a[0]); $b = $a; $a[] = 3; $b[] = 4; var_dump($a, $b); // $a = [0=>3] $b = [2=>4] When increase variables, only the last one take over key. Expected result: ---------------- Always same key whth $a and $b. Actual result: -------------- Same key when array is not empty. Not same key when array is empty. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79364&edit=1