Thread:Project:Support desk/"/usr/bin/diff3: No newline at end of file"

Hi, the fpm.log of my pet project at http://espiral.org is full of warnings like these:

[12-Aug-2013 16:18:45] WARNING: [pool www] child 841 said into stderr: "/usr/bin/diff3: No newline at end of file" [12-Aug-2013 16:18:45] WARNING: [pool www] child 841 said into stderr: "/usr/bin/diff3: No newline at end of file" [12-Aug-2013 16:30:43] WARNING: [pool www] child 1052 said into stderr: "/usr/bin/diff3: No newline at end of file" [12-Aug-2013 16:30:43] WARNING: [pool www] child 1052 said into stderr: "/usr/bin/diff3: No newline at end of file" [12-Aug-2013 17:00:15] WARNING: [pool www] child 1081 said into stderr: "/usr/bin/diff3: No newline at end of file" [12-Aug-2013 17:00:15] WARNING: [pool www] child 1081 said into stderr: "/usr/bin/diff3: No newline at end of file"

EDITED: checking access.log, the queries provoking these errors seem to be malicious, or at least abnormal e.g.

index.php?title=(((the title)))&action=edit&undoafter=1049&undo=1234

Should I worry?


 * MediaWiki    1.21.1
 * PHP    5.4.4-14+deb7u2 (fpm-fcgi)
 * MySQL    5.5.31-0+wheezy1-log

PS: there is a related report opened at. However, looking at web pages related to this warning this seems to be more related to PHP memory management in a specific server than any MediaWiki bug. Any advice is welcome.