Bug #67169 [NEW]: array_splice all elements, then []= gives wrong index

From: gabriel at figdice dot org Operating system: Debian Wheezy PHP version: 5.6.0beta1 Package: Arrays related Bug Type: Bug Bug description:array_splice all elements, then []= gives wrong index Description: ------------ REGRESSION in beta1: the scenario worked fine until 5.6.0alpha1 incl. When splicing off all the elements of an indexed array, thus leaving the array empty, a subsequent all to the shortcut []= assignment will set the new item at a key which is not zero (unlike expected) but the previous "next index", which is what would happen should we not have spliced the array empty. For example, if you append two items in an array, then array_splice them off (from index 0, for length 2, replacing with nothing), then if later on you append a brand new element in your emptied array, it gets index 2 instead of expected 0. Test script: --------------- <?php // Bug in PHP 5.6.0-beta-1 // also failing in PHP 5.7.0-dev // When splicing off all the elements of an indexed array, // thus leaving the array empty, // a subsequent all to the shortcut []= assignment will set the new item // at a key which is not zero (unlike expected) but the previous "next index", // which is what would happen should we not have spliced the array empty. $arr = array(); $arr[] = 'something'; $arr[] = 'some more'; array_splice($arr, 0, 2); $arr[] = 'should be index zero'; print_r($arr); /* will produce: Array ( [2] => should be index zero ) */ -- Edit bug report at https://bugs.php.net/bug.php?id=67169&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=67169&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=67169&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=67169&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=67169&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=67169&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=67169&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=67169&r=needscript Try newer version: https://bugs.php.net/fix.php?id=67169&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=67169&r=support Expected behavior: https://bugs.php.net/fix.php?id=67169&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=67169&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=67169&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=67169&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=67169&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=67169&r=dst IIS Stability: https://bugs.php.net/fix.php?id=67169&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=67169&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=67169&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=67169&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=67169&r=mysqlcfg