Bug #65821 [NEW]: By-ref foreach on property access of string offset segfaults

From: nikic Operating system: PHP version: 5.5.4 Package: Scripting Engine problem Bug Type: Bug Bug description:By-ref foreach on property access of string offset segfaults Description: ------------ This segfaults: $str = "foo"; foreach ($str[0]->bar as &$baz) {} Because http://lxr.php.net/xref/PHP_TRUNK/Zend/zend_vm_def.h#1391 uses var.ptr_ptr without NULL check (FETCH_OBJ_W with ZEND_FETCH_ADD_LOCK). -- Edit bug report at https://bugs.php.net/bug.php?id=65821&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=65821&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=65821&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=65821&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=65821&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=65821&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=65821&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=65821&r=needscript Try newer version: https://bugs.php.net/fix.php?id=65821&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=65821&r=support Expected behavior: https://bugs.php.net/fix.php?id=65821&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=65821&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=65821&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=65821&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65821&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=65821&r=dst IIS Stability: https://bugs.php.net/fix.php?id=65821&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=65821&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=65821&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=65821&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=65821&r=mysqlcfg