[Bug regex/693] New: mishandled '\B'

["kasal at ucw dot cz" <sourceware-bugzilla at sources dot redhat dot com>]

The GNU extension '\B' has always meant non-\b.
The dfa.[ch] code included in grep and gawk still handles it this way.
Try echo '  ' | grep ' \B ' on your system, try gsub(/ \B /,...) in gawk-3.1.1
or gawk '/ B /' with current gawk.

I have checked Perl documentation; it also defines '\B' and non-\b.

But current regex has changed to interpret '\B' as inword space.  Try the above
gsub with current awk.

See also http://lists.gnu.org/archive/html/bug-gnu-utils/2005-01/msg00087.html

IMHO, the current regex code is not correct.

-- 
           Summary: mishandled '\B'
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: regex
        AssignedTo: gotom at debian dot or dot jp
        ReportedBy: kasal at ucw dot cz
                CC: glibc-bugs-regex at sources dot redhat dot com,glibc-
                    bugs at sources dot redhat dot com


http://sources.redhat.com/bugzilla/show_bug.cgi?id=693

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