Bug #74519 [Opn->Csd]: strange behavior of AppendIterator

Edit report at https://bugs.php.net/bug.php?id=74519&edit=1 ID: 74519 Updated by: krakjoe@php.net Reported by: jhdxr@php.net Summary: strange behavior of AppendIterator -Status: Open +Status: Closed Type: Bug Package: SPL related Operating System: irrelevant PHP Version: 7.0.18 Block user comment: N Private report: N New Comment: Automatic comment on behalf of jhdxr Revision: http://git.php.net/?p=php-src.git;a=commit;h=01eafceea12913e710b992fd88e5ab1e23662447 Log: Fixed bug #74519 strange behavior of AppendIterator Previous Comments: ------------------------------------------------------------------------ [2017-05-01 10:31:30] jhdxr@php.net 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 this bug report at https://bugs.php.net/bug.php?id=74519&edit=1