Glynn Clements <glynn(a)sensei.co.uk&gt; writes: Which OS... Linux probably? (judging from the libs) (Could you please recreate using an XEmacs with "-g"? (even nicer would be if libgpm.so and/or glibc were also "-g" compiled). (is this in a signal handler?) It is crashing in libgpm (maybe in a signal handler). the gpm code cannot handle what we do with it (see the PROBLEMS file), so maybe this just another symptom. However I am not sure we are doing everything correctly when creating tty devices. Somebody on Digital Unix reported this: # (unwind-protect ...) make-device(tty "/dev/ttyp4" (terminal-type "vt100" controlling-process 1069)) # bind (controlling-process terminal-type tty) make-tty-device("/dev/ttyp4" "vt100" 1069) apply(make-tty-device ("/dev/ttyp4" "vt100" 1069)) # bind (dest-frame new-frame old-device-num quick view flags list type) gnuserv-edit-files((tty "/dev/ttyp4" "vt100" 1069) nil) With the following C part (gdb) where #0 0x3ff82067a10 in __kill () #1 0x120086950 in fatal_error_signal (sig=-2113585884) at emacs.c:220 #2 <signal handler called> #3 0x120191690 in _free_internal (ptr=0x3ffc062e0a0 "") at gmalloc.c:789 #4 0x120191b54 in free (ptr=0x3ffc062e0a0 "") at gmalloc.c:950 #5 0x3ff8082a260 in setupterm () #6 0x3ff80825d54 in tgetent () #7 0x1200b2504 in init_tty_for_redisplay (d=0x140648000, etc. There is also another guy having weird buffering problems between gnuserv and XEmacs IF AND ONLY IF he starts XEmacs from his windowmanager. Weird... Jan