[crash]: more on `internal bug', and another `fatal i/o error'

gesture, and XEmacs disappeared. There was no core dump. I found this in ~/.xsession-errors: Lisp backtrace follows: ding(nil command-error) # bind (inhibit-quit debug-on-error etype error-object) command-error((wrong-type-argument symbolp #<INTERNAL EMACS BUG (symbol-value-forward type 13) 0x0x82492e8>)) # (catch top-level ...) /usr/local/bin/xg: line 7: 26866 Terminated xemacs "$＠" xemacs: Fatal I/O Error 14 (Bad address) on display connection ":0.0" after 107657 requests (107655 known processed) with 0 events remaining. The backtrace is from the crash I sent a screenshot of, and the last message is from the disappearing act.