GNU grep 2.5 bug

[Garrett Comeaux]

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I believe I've found a bug in GNU grep 2.5.  The bug is visible
when the -i and -f options are used together:
grep -i -f /usr/local/etc/logcheck.violations

I'm using the actual logcheck packages logcheck.violations file,
and I noticed that way too many matches were coming back.  I then
used the color option to highlight exactly what was being matched.
Not every line had a colored match, so I used the -o option. Here's
what I saw:

grep -i -f /usr/.../logcheck.violations /var/adm/messages | wc -l
433
grep -o -i -f /usr/.../logcheck.violations /var/adm/messages | wc -l
28

I fixed the problem by changing the EGexecute function in search.c.

I changed

~  /* Successful, no backreferences encountered! */
          if (!backref)
            goto success;

to

~  /* Successful, no backreferences encountered! */
~       /*
          if (!backref)
            goto success;
~        */

Just commenting out this goto fixed what I was seeing, but I don't
know if it caused any other problems.


Hope this helps.

Garrett
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