Bug #77827 [Opn]: preg_match throws error on valid expression

Edit report at https://bugs.php.net/bug.php?id=77827&edit=1 ID: 77827 Updated by: peehaa@php.net Reported by: peehaa@php.net Summary: preg_match throws error on valid expression Status: Open Type: Bug Package: PCRE related Operating System: Windows PHP Version: 7.3.3 Block user comment: N Private report: N New Comment: Nope. Same result. When I check a hex dump of my file I also do not see anything strange at first sight. Previous Comments: ------------------------------------------------------------------------ [2019-03-30 19:43:03] requinix@php.net Works for my 7.3.3 on Windows. Does it work if you copy/paste the code from this bug report? Is there maybe a stray unprintable character in your file? ------------------------------------------------------------------------ [2019-03-30 19:37:24] peehaa@php.net Weirdly enough when I use a single line pattern it starts working: <?php $pattern = '~^(?:(?:(?P<function>function)\s*\(\s*(?:(?P<table1>.+)(?:\.))?(?P<column1>[^ ]+)\s*\))|(?:(?P<table2>.+)(?:\.))?(?P<column2>[^ ]+))(?:\s+as\s+(?P<alias>.+))?$~ix'; var_dump(PCRE_VERSION); var_dump(preg_match($pattern, 'id')); var_dump(preg_last_error()); ----- string(16) "10.32 2018-09-10" int(1) int(0) Am I doing something wrong here in combination with the platform I am on somehow? ------------------------------------------------------------------------ [2019-03-30 17:49:26] peehaa@php.net Description: ------------ When running the repro script on my machine I am hitting two issues: 1. preg_match is unable to handle my valid expression 2. it outputs a broken error message This only happens on my (Windows) machine. On 3v4l (https://3v4l.org/hdiM4) it's working like it should. Test script: --------------- <?php $pattern = ' ~^ (?: (?:(?P<function>function)\s*\(\s* (?:(?P<table1>.+)(?:\.))?(?P<column1>[^ ]+) \s*\)) | (?:(?P<table2>.+)(?:\.))?(?P<column2>[^ ]+) ) (?:\s+as\s+(?P<alias>.+))? $~ix '; var_dump(PCRE_VERSION); var_dump(preg_match($pattern, 'id')); var_dump(preg_last_error()); Expected result: ---------------- string(16) "10.32 2018-09-10" int(1) int(0) Actual result: -------------- string(16) "10.32 2018-09-10" ' in \path\to\php-bug.php on line 17 bool(false) int(1) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=77827&edit=1