Bug #73792 [NEW]: invalid foreach loop hangs script

From: ryan dot brothers at gmail dot com Operating system: Linux PHP version: 7.1.0 Package: Scripting Engine problem Bug Type: Bug Bug description:invalid foreach loop hangs script Description: ------------ When running the below in PHP 7.1.0, the foreach loop hangs the script, and my CPU goes to 100% utilization. If &$value is changed to $value, then it runs cleanly. Test script: --------------- <?php $a = 'aaa'; foreach ($a['bbb'] as &$value) { echo 'loop'; } unset($value); echo 'done'; Expected result: ---------------- Warning: Illegal string offset 'bbb' in /tmp/test.php on line 4 Warning: Invalid argument supplied for foreach() in /tmp/test.php on line 4 done Actual result: -------------- Warning: Illegal string offset 'bbb' in /tmp/test.php on line 4 then it hangs -- Edit bug report at https://bugs.php.net/bug.php?id=73792&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73792&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73792&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73792&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73792&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73792&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73792&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73792&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73792&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73792&r=support Expected behavior: https://bugs.php.net/fix.php?id=73792&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73792&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73792&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73792&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73792&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73792&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73792&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73792&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73792&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73792&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73792&r=mysqlcfg