Bug 619124 - pcre behavior change
pcre behavior change
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: doc-Migration_Guide (Show other bugs)
All Linux
low Severity medium
: rc
: ---
Assigned To: Laura Bailey
: Documentation
Depends On:
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Reported: 2010-07-28 11:54 EDT by Petr Pisar
Modified: 2013-02-05 18:56 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2010-07-28 17:24:27 EDT
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Description Petr Pisar 2010-07-28 11:54:56 EDT
`pcre' package has been rebased to 7.8 version. It brings following behavior changes:

* UTF-8 checking is now as per RFC 3629 instead of RFC 2279; this is more
  restrictive in the strings it accepts.
  E.g., UTF-8 character ordinal value is limited to 0x0010FFFF value now:

  $ echo -ne "\x00\x11\xff\xff" | recode UCS-4-BE..UTF8 | pcregrep --utf-8 '.'
  pcregrep: pcre_exec() error -10 while matching this line:

  See <http://tools.ietf.org/html/rfc3629#section-12> for more details.

* Saved patterns that were compiled by earlier versions of PCRE must be

  This affects applications that serialize precompiled PCRE expressions to
  external memory (e.g. a file) and load them later (for performance reasons
  usually, like large spam filters).
Comment 2 Scott Radvan 2010-07-28 17:24:27 EDT
Have added this to the guide, changes will appear on the next publish.

Thanks for the specific details, Petr! It's appreciated.

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