Ronald Pottol <chaos(a)chaostrophy.org&gt; writes: This is a known (and probably unsolvable) problem with the Xt libraries. It used to be that XEmacs died immediately, so there has been some improvement. Unfortunately this is useless... I if interpret the gdb mailing list archives correctly this because gdb prior to gdb 4.18+patch from july cannot interpret the linux kernel trampolines. If you [or any body else running Red Hat 6.x] have the time could you try a development snapshot from gdb (http://sourceware.cygnus.com/gdb) to confirm that is fixed that would be nice. Jan