Bug #75420 [NEW]: Crash when modifing property name in __isset for BP_VAR_IS

From: nikic Operating system: PHP version: 7.0.24 Package: Scripting Engine problem Bug Type: Bug Bug description:Crash when modifing property name in __isset for BP_VAR_IS Description: ------------ $name is changed from string to int in the __isset() call, so that the subsequent __get() call crashes. Test script: --------------- <?php class Test { public function __isset($x) { $GLOBALS['name'] = 24; return true; } public function __get($x) { var_dump($x); return 42; } } $obj = new Test; $name = "foo"; var_dump($obj->$name ?? 12); -- Edit bug report at https://bugs.php.net/bug.php?id=75420&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75420&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75420&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75420&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75420&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75420&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75420&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75420&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75420&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75420&r=support Expected behavior: https://bugs.php.net/fix.php?id=75420&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75420&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75420&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75420&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75420&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75420&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75420&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75420&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75420&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75420&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75420&r=mysqlcfg