[Bug regex/693] mishandled '\B'

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

------- Additional Comments From kasal at ucw dot cz  2005-01-31 05:40 -------
(In reply to comment #6)
>         print ("  " ~ / \B /)   # test dfa matcher

I tried the following:
$ gawk 'BEGIN{print "a b" ~ /\B/}'
0
$ gawk 'BEGIN{print " b" ~ /\B/}'
1
$ gawk 'BEGIN{print "a " ~ /\B/}'
1

This proves that the dfa matcher has the same opinion of the current CVS regex.

I'd to conclude that the old regex contained a bug which was not discovered
until now, when it is dead for more than 2 years.

(FWIW, I have also verified that perl has the same behaviour as PCRE and new
regex and dfa.c.)

The current regex.c seems OK.  Thank you again, Jakub.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


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

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