Version 2.5.1a of grep
Release Notes:
Other releases
Release Notes: grep no longer mishandles high-bit-set pattern bytes on systems where "char" is a signed type (probably only affecting MS Windows). Command lines which potentially result in an infinite disk-filling loop are now rejected.
Release Notes: grep's interpretation of range expression is now more consistent with that of other tools. The exit status on memory allocation failure was fixed. "grep -P" no longer aborts when PCRE's backtracking limit is exceeded. Handling of regular expressions that match multibyte characters in brackets was made faster. Other minor bugs were fixed.
Release Notes: Commonly mistyped regular expressions are now detected and lead to an error unless POSIXLY_CORRECT is set. Regular expressions including back references are now significantly faster in multi-byte locales. Regular expressions including "." can now be significantly faster in UTF-8 locales (though not in other multi-byte locales). Several other minor bugs were fixed.
Release Notes: Massive improvements were made to the handling of multi-byte character sets, fixing many failures and increasing speed. The "-P" option now works more correctly. Whole-word matches with back-references were fixed. Several other bugs were fixed.
Release Notes: This is primarily a bugfix release.
