Bug #70237 [NEW]: Empty while and do-while segmentation fault with opcode on CLI enabled

From: notrix at gmail dot com Operating system: Ubuntu 14.04 PHP version: 5.5.28 Package: opcache Bug Type: Bug Bug description:Empty while and do-while segmentation fault with opcode on CLI enabled Description: ------------ If I enable opcache on cli environment (opcache.enable_cli) and run my test.php script I get: "[1] 19066 segmentation fault (core dumped) php test.php" This happens only if while (or do-while) condition is variable and content (between curly braces) is empty or contains only comments. Actually the code makes no sense, but I had to debug few hours and found this exact code with only comment "// TODO: .." in do-while braces. Commenting out whole loop block fixed issue, but it's still a bug I think. Reproduced on php 5.5.27 and 5.6.11 Test script: --------------- <?php if ((int) ini_get('opcache.enable_cli') !== 1) { throw new Exception('Opcode cache must be enabled on CLI environment'); } function neverUsed() { $bool = false; while ($bool) { }; // Same with: do { } while ($bool); } echo "OK"; Expected result: ---------------- Expected to see OK printed Actual result: -------------- [1] 19066 segmentation fault (core dumped) php test.php -- Edit bug report at https://bugs.php.net/bug.php?id=70237&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70237&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70237&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70237&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70237&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70237&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70237&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70237&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70237&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70237&r=support Expected behavior: https://bugs.php.net/fix.php?id=70237&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70237&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70237&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70237&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70237&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70237&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70237&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70237&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70237&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70237&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70237&r=mysqlcfg