https://bugs.exim.org/show_bug.cgi?id=2321
Bug ID: 2321
Summary: JIT false match with some unicode ranges
Product: PCRE
Version: 10.32 (PCRE2)
Hardware: x86
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Code
Assignee: ph10@???
Reporter: jay@???
CC: pcre-dev@???
I originally filed this with PHP since it was something I was only seeing in
php 7.3.0RC1, but sounds like it's ultimately a PCRE bug, and only when JIT is
enabled.
https://bugs.php.net/bug.php?id=76909
Full details can be taken from that bug report, but I'll reproduce the basics
here.
This regular expression: /^[\x{0100}-\x{017f}]{1,63}$/iu
Ran against this string: " domain.com" (without the quotes, notice that it
begins with a space)
Matches the string, but as I understand it (and how earlier PHP versions that
are bundled with earlier versions of PCRE process it), there shouldn't be a
match.
As mentioned in the comments of the PHP bug report, if PCRE JIT is disabled,
the string is no longer matched.
Thanks!
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