Bug #75393 [NEW]: Crash when assign-adding an array to an object

From: bwoebi Operating system: Irrelevant PHP version: 7.0Git-2017-10-16 (Git) Package: Reproducible crash Bug Type: Bug Bug description:Crash when assign-adding an array to an object Description: ------------ Assign-adding an array to an object leads to an use-after-free. Test script: --------------- $o = new stdClass; $o += []; Expected result: ---------------- Notice: Object of class stdClass could not be converted to int in - on line 1 Fatal error: Uncaught Error: Unsupported operand types in -:1 Stack trace: #0 {main} thrown in - on line 1 Actual result: -------------- Invalid read -- Edit bug report at https://bugs.php.net/bug.php?id=75393&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75393&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75393&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75393&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75393&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75393&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75393&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75393&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75393&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75393&r=support Expected behavior: https://bugs.php.net/fix.php?id=75393&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75393&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75393&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75393&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75393&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75393&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75393&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75393&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75393&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75393&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75393&r=mysqlcfg