[debbugs-tracker] bug#24134: closed (problem with fgrep - only matches if I leave off the last character of the line)

[GNU bug Tracking System]

Your message dated Tue, 2 Aug 2016 09:54:43 -0700
with message-id <address@hidden>
and subject line Re: bug#24134: problem with fgrep - only matches if I leave 
off the last character of the line
has caused the debbugs.gnu.org bug report #24134,
regarding problem with fgrep - only matches if I leave off the last character 
of the line
to be marked as done.

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24134: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=24134
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--- Begin Message --- Subject: problem with fgrep - only matches if I leave off the last character of the line Date: Tue, 2 Aug 2016 14:37:33 +0200

Dear Developer Team,

I have encountered a problem related to fgrep, while I was trying to search back and forth in a file filled with a number of log messages.

I have managed to narrow down the input file to a few lines, and also wrote a reproduction guide for it.

I have checked it with a few different grep versions, but not all seemed to be affected.

Grep 2.6.3 (CentOS 6) and 2.16 (Ubuntu 14.04) were, and 2.25 (Unbuntu 16.04) wasn't.

The problem basically was, that I was fgrepping for messages in syslog-ng debug logs, and I was looking for matches that matched the log lines, that were sent to syslog-ng (ie. messages about incoming log messages), and there were a few messages, where there was no match for the whole message, but if I removed the last character of the string I was grepping for, then it did return a match.

The match also showed the character I removed previously, so it was unclear why there was no match with the last character, and why there was without...

I tried to look for already closed bugs that looked similar, but I did not manage to find anything similar.

Thanks for your help!

Best Regards,

János Szigetvári

--

Janos SZIGETVARI
RHCE, License no. 150-053-692

E-mail: address@hidden
Phone: +36209440412 (Hungary)

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reproduction-guide.txt
Description: Text document

reproduction-sample.txt
Description: Text document

--- End Message ---

> --- Begin Message ---
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> Subject: 
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> Re: bug#24134: problem with fgrep - only matches if I leave off the last character of the line
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> Date: 
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> Tue, 2 Aug 2016 09:54:43 -0700
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0
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> SZIGETVÁRI János wrote:
> > I tried to look for already closed bugs that looked similar, but I did not
> > manage to find anything similar.
>
> Thanks for the bug report. We have fixed several bugs with fgrep since grep 2.16 
> came out. For what it's worth, I could not reproduce the bug with grep 2.20 
> (RHEL 6.8) either. Since the bug does not appear to occur with recent grep 
> versions, I'm inclined to close the bug report.
>
>
> --- End Message ---