http://bugs.winehq.org/show_bug.cgi?id=28799
--- Comment #3 from Michael Mc Donnell michael@mcdonnell.dk 2012-03-21 18:12:21 CDT --- Created attachment 39490 --> http://bugs.winehq.org/attachment.cgi?id=39490 Patch for not welding self
It looks like the error message is caused by the destination and source being the same. This patch makes sure that a vertex is not welded with itself.