Bug #74519 [NEW]: strange behavior of AppendIterator

From: jhdxr@php.net Operating system: irrelevant PHP version: 7.0.18 Package: SPL related Bug Type: Bug Bug description:strange behavior of AppendIterator Description: ------------ If an ArrayIterator was appended to an AppendIterator, and the inner pointer of ArrayIterator was changed (foreach, ->next or something else), it would also effect AppendIterator in a strange way, see the test script (https://3v4l.org/EavLv) below. I'm not sure if the iterators were appended by reference or value (clone a new copy), but current result cannot be explained in either way. Test script: --------------- <?php $iterator = new \AppendIterator(); $events = new \ArrayIterator([1,2,3,4,5]); $iterator->append($events); $events->next(); while($iterator->valid()) { echo $iterator->current(), "\n"; $iterator->next(); } Expected result: ---------------- append reference: 2 3 4 5 or append clone: 1 2 3 4 5 Actual result: -------------- 1 3 4 5 -- Edit bug report at https://bugs.php.net/bug.php?id=74519&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74519&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74519&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74519&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74519&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74519&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74519&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74519&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74519&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74519&r=support Expected behavior: https://bugs.php.net/fix.php?id=74519&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74519&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74519&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74519&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74519&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74519&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74519&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74519&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74519&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74519&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74519&r=mysqlcfg