I also reported the problem at https://bugs.freedesktop.org/show_bug.cgi?id=50252 Spec URL: http://fedorapeople.org/~pcpa/libXaw.spec SRPM URL: http://fedorapeople.org/~pcpa/libXaw-1.0.9-4.fc18.src.rpm This patch is required to avoid crashes in any application using the Xaw text widget.
libXaw-1.0.11 is now in rawhide and the patch was added to upstream tarball. The issue was only known to affect xedit, but could also affect any other application using the Xaw text widget and built with gcc 4.7.