ID: 50299 Updated by: ka...@php.net Reported By: shepik at yandex dot ru -Status: Open +Status: Feedback Bug Type: SPL related -Operating System: windows / linux +Operating System: * PHP Version: 5.3SVN-2009-11-25 (snap) New Comment:
Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2009-11-25 21:56:09] shepik at yandex dot ru (and i don't know if i should select "SPL related" or "reproducible crash" category, so if i'm wrong with selecting "SPL", please correct me) ------------------------------------------------------------------------ [2009-11-25 21:17:57] shepik at yandex dot ru And if change code to $P = new lazyNew(function() use (&$P) { $v = new ArrayIterator(array(1,2,3,4,5)); $P = null; return $v; }); instead of fatal error, or "12345", or something else, i get segmentation fault. ------------------------------------------------------------------------ [2009-11-25 21:10:53] shepik at yandex dot ru Description: ------------ I tried this in php 5.3.2-dev (snapshot from 2009-11-19, latest php for windows available) and in php 5.3.0 on linux. I tried to do something like 'lazy object instantiation', and found this strange behaviour of php. Method "valid" declared in "lazyNew" class is called in context of instance of "ArrayIterator" class. Reproduce code: --------------- <?php class lazyNew implements Iterator { private $obj = null; private $func ; public function __construct($func) { $this->func = $func; } public function init() { if ($this->obj === null) { $func = $this->func; $this->obj = $func(); } return $this->obj; } public function current() { return $this->init()->current(); } public function valid() { echo "valid on ".get_class($this)."\n"; //also try var_dump($this) return $this->init()->valid(); } public function next() { return $this->init()->next(); } public function key() { return $this->init()->key(); } public function rewind() { echo "rewind on ".get_class($this)."\n"; return $this->init()->rewind(); } } $P = new lazyNew(function() use (&$P) { return $P = new ArrayIterator(array(1,2,3,4,5)); }); foreach ($P as $val) echo($val); ?> Expected result: ---------------- rewind on lazyNew valid on lazyNew 12345 Actual result: -------------- rewind on lazyNew valid on ArrayIterator Fatal error: Call to undefined method ArrayIterator::init() in /storage1/www/htdocs/evectio/scripts/test.php on line 20 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=50299&edit=1
