Last modified: 2011-04-04 21:28:27 UTC

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Bug 3809 - On edit conflict, if diff3 fails, an empty article is committed.
On edit conflict, if diff3 fails, an empty article is committed.
Product: MediaWiki
Classification: Unclassified
History/Diffs (Other open bugs)
Other Solaris
: Normal normal (vote)
: ---
Assigned To: Nobody - You can work on this!
Depends on:
  Show dependency treegraph
Reported: 2005-10-27 13:16 UTC by Dossy Shiobara
Modified: 2011-04-04 21:28 UTC (History)
1 user (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Description Dossy Shiobara 2005-10-27 13:16:18 UTC
I've been seeing sporadic occurrences of a strange bug: on submitting an edit,
the entire article body is truncated.

I think I've finally figured out what is causing this.  This seems to happen
when there's an editing conflict, and diff3 is invoked.  There's no errors in
the PHP log, but I see this in the Apache error log:

diff: illegal option -- a
usage: diff [-bitw] [-c | -e | -f | -h | -n] file1 file2
       diff [-bitw] [-C number] file1 file2
       diff [-bitw] [-D string] file1 file2
       diff [-bitw] [-c | -e | -f | -h | -n] [-l] [-r] [-s] [-S name] directory1
/path/to/diff3: subsidiary program `diff' failed

This seems to be a PATH error -- GNU diff is installed in /path/to/diff, but the
system (Solaris 5.8) has a diff in /usr/bin/diff, which seems to be getting
invoked by diff3.

Clearly this is a "configuration error" but MediaWiki should detect the failure
of diff3 and either reject the edit because it can't merge OR do something
otherwise intelligent rather than truncating the article text and committing it.
Comment 1 Brion Vibber 2005-10-27 23:06:04 UTC
This was already fixed on the head branch; I've copied it into REL1_5 and it should 
appear in 1.5.2.

The change you want is:

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