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+++ This bug was initially created as a clone of Bug #815217 +++

This should match:

/\w+\x{C4}/8BZT1
a\x{C4}\x{C4}

But it does not because a some tests in non-unicode mode checks only for characters with ordinal numbers 0-127 instead of 0-255.

This is fixed in upstream commit:

r962 | ph10 | 2012-04-20 19:28:23 +0200 (Pá, 20 dub 2012) | 3 lines
Fix auto-possessifying bugs when PCRE_UCP is not set, but character tables 
specify characters in the range 127-255 are letters, spaces, etc.

All Fedoras affected.

--- Additional comment from ppisar on 2012-04-23 08:03:49 GMT ---

Fixed as pcre-8.30-5.fc18 in F18.

--- Additional comment from updates on 2012-04-23 08:52:10 GMT ---

pcre-8.21-5.fc17 has been submitted as an update for Fedora 17.
https://admin.fedoraproject.org/updates/pcre-8.21-5.fc17

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RHEL-7 (pcre-8.21-4.el7.x86_64) affected.