Bug #75539 [NEW]: Recursive call errors are not reported by preg_last_error()

From: grzegorz129 at gmail dot com Operating system: N/A PHP version: 7.2.0RC6 Package: PCRE related Bug Type: Bug Bug description:Recursive call errors are not reported by preg_last_error() Description: ------------ I found a strange (yet consistent across since 5.6) regarding infinite loop patterns error reporting. preg_match() correctly identifies broken patterns and triggers E_WARN, however preg_last_error() returns PREG_NO_ERROR instead of expected PREG_RECURSION_LIMIT_ERROR. It may be related to https://bugs.php.net/bug.php?id=74183 Test script: --------------- <?php // Test at https://3v4l.org/UkeMa var_dump(preg_match('/((?1)?z)/', '')); var_dump(preg_last_error() === \PREG_NO_ERROR); Expected result: ---------------- - preg_match() returning false - preg_last_error() returning value of PREG_RECURSION_LIMIT_ERROR Actual result: -------------- - preg_match() returns false - preg_last_error() returns value of PREG_NO_ERROR -- Edit bug report at https://bugs.php.net/bug.php?id=75539&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75539&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75539&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75539&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75539&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75539&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75539&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75539&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75539&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75539&r=support Expected behavior: https://bugs.php.net/fix.php?id=75539&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75539&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75539&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75539&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75539&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75539&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75539&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75539&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75539&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75539&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75539&r=mysqlcfg