Bug #80090 [NEW]: Incorrect character detection with unicode escape sequence

From: busuioc dot alexandru at gmail dot com Operating system: Alpine PHP version: 7.4.10 Package: PCRE related Bug Type: Bug Bug description:Incorrect character detection with unicode escape sequence Description: ------------ PHP 7.4.9 on Alpine image --------------------- # php -m [PHP Modules] apcu blackfire Core ctype curl date dom fileinfo filter ftp gd hash iconv json libxml mbstring mcrypt memcached mongodb mysqli mysqlnd openssl pcntl pcre PDO pdo_mysql pdo_sqlite phalcon Phar posix psr readline redis Reflection session SimpleXML sockets sodium SPL sqlite3 standard tokenizer xdebug xml xmlreader xmlwriter Zend OPcache zip zlib [Zend Modules] Xdebug Zend OPcache blackfire ------------------------- # php --ri pcre pcre PCRE (Perl Compatible Regular Expressions) Support => enabled PCRE Library Version => 10.34 2019-11-21 PCRE Unicode Version => 12.1.0 PCRE JIT Support => enabled PCRE JIT Target => x86 64bit (little endian + unaligned) Directive => Local Value => Master Value pcre.backtrack_limit => 1000000 => 1000000 pcre.recursion_limit => 100000 => 100000 pcre.jit => 1 => 1 Test script: --------------- Using '\pL' escape sequence followed by another escape sequence with a script name (e.g. \p{Arabic}) will incorrectly detect some ASCII characters (at least the "s" (the small letter)). Steps to reproduce: ``` <?php $pattern1 = '/^[0-9_\p{L}\p{Cyrillic}]+$/u'; var_dump(preg_match($pattern1, 's')); var_dump(preg_match($pattern1, 'S')); ``` The output is ``` int(0) int(1) ``` Removing the "\p{Cyrillic}" from the regex pattern above will make it return the expected output: ``` int(1) int(1) ``` Also, as a workaround, adding the "a-zA-Z" sequence in regex pattern would solve the problem. This bug can be checked here as well https://3v4l.org/bqsue -- Edit bug report at https://bugs.php.net/bug.php?id=80090&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80090&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80090&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80090&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80090&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80090&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80090&r=support Expected behavior: https://bugs.php.net/fix.php?id=80090&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80090&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80090&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80090&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80090&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80090&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80090&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80090&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80090&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80090&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80090&r=mysqlcfg