segfault when leaving village

hi =) i get a segfault when leaving the village :
Main/Include/wterra.h:30 : v2 GetPos() const { return WSquareUnder->GetPos(); } anyone got an idea ?

stacktrace : http://rafb.net/p/qs9TF930.txt
running linux kubuntu hardy (8.04), and the CVS version of ivan
( server:anonymous@ivan.cvs.sourceforge.net:/cvsroot/ivan )
checked out some time yesterday
( no idea how to find out the revision number in svn )

at first i tried :
http://www.attnam.com/downloads.php?id=3
no linux build, but the win exe seems to run fine in wine, also i can leave town without segfaulting.

now i'm trying to get the source from nukes to compile natively,
with ./configure CFLAGS="-O0" CXXFLAGS="-O0"
http://attnam.com/viewtopic.php?t=247