Martin Buchholz <martin(a)xemacs.org&gt; writes: I've occassionally found this very useful. Use pobj to print the elements of the args arrays in the Ffuncall stack frames. args[0] should be the function names. I've never found any use for that so far as it requires a running xemacs process, i.e. doesn't work on core dumps or completely fubared processes. :-) Karl, if you are trying to reproduce this, it might be useful to set always_gc to 1 and perform whatever actions triggered the bug. Be warned this is going to be very slow. Gunnar