drepper(a)cygnus.com (Ulrich Drepper) writes: :-) What compiler were you using? not good sort of good. Reproducability is nice. Is that the complete backtrace? The frames just above would be more interesting. However your "reproduction recipe" sounds familiar. [searches archives] Does reading http://www.xemacs.org/list-archives/xemacs-beta/9908/msg00068.html and the corresponding thread ring any bells? I think this is your bug. The idea is basically that your keystroke comes in with a window id of a window that XEmacs thinks has deleted. That is this bug is in 21.1.x is new. Were you running any of the 21.1.x series before? (just in case one of the backported fixes from 21.2 is the cause) Jan