Bug #73789 [NEW]: Strange behavior of class constants in switch/case block

From: oliver dot hader at typo3 dot org Operating system: Mac OS PHP version: 7.1.0 Package: CGI/CLI related Bug Type: Bug Bug description:Strange behavior of class constants in switch/case block Description: ------------ The behavior occurs only in PHP 7.1.0 CGI context, using the CLI wrapper everything works as expected. Besides that, the scenario seems to at least require a switch/case block, several class constants and constant look-ups and multiple return types. Find further down the minimal source code that is required to reproduce this issue. Parts of the code were taken from the TYPO3 CMS project, where this issue has been identified and worked around in a specific patch (https://review.typo3.org/#/c/50998/). On executing the test script, the PHP process hangs and consumes a lot of CPU. Test script: --------------- see https://gist.github.com/ohader/ed0093e95f7f88714903425021f2b426 -- Edit bug report at https://bugs.php.net/bug.php?id=73789&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73789&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73789&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73789&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73789&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73789&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73789&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73789&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73789&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73789&r=support Expected behavior: https://bugs.php.net/fix.php?id=73789&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73789&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73789&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73789&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73789&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73789&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73789&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73789&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73789&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73789&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73789&r=mysqlcfg