sb> Colin Rafferty <craffert(a)ms.com&gt; writes in xemacs-beta(a)xemacs.org: sb> ... sb> This sequence crashes on me. sb> Fatal error: assertion failed, file redisplay-x.c, line 491, abort() Same here, on a Solaris 2.5.1 box, gcc 2.7.2.x, xemacs 21.0 b60. A snip of the traceback is: #0 0xef0f452c in kill () #1 0x9326c in fatal_error_signal (sig=6) at emacs.c:262 #2 <signal handler called> #3 0xef0f452c in kill () #4 0xef0ba5d4 in abort () #5 0x95e9c in assert_failed (file=0x2a9c48 "redisplay-x.c", line=491, expr=0x2a9ca0 "abort()") at emacs.c:2608 #6 0x20e9dc in x_output_display_block (w=0x5abe00, dl=0x74d3f0, block=7632256, start=18, end=46, start_pixpos=19, cursor_start=359, cursor_width=5, cursor_height=13) at redisplay-x.c:491 #7 0x1b30a4 in compare_display_blocks (w=0x5abe00, cdl=0x7613f0, ddl=0x74d3f0, c_block=46, d_block=0, start_pixpos=19, cursor_start=359, cursor_width=5, cursor_height=13) at redisplay-output.c:419 #8 0x1b4c1c in output_display_line (w=0x5abe00, cdla=0x5f3780, ddla=0x5f3760, line=14, force_start=19, force_end=580) at redisplay-output.c:659 #9 0x1b6e80 in redisplay_output_window (w=0x5abe00) at redisplay-output.c:1318 #10 0x1a3c04 in redisplay_window (window=5946880, skip_selected=468) at redisplay.c:5241 #11 0x1a4448 in redisplay_frame (f=0x537200, preemption_check=0) at redisplay.c:5417 #12 0x1a4764 in redisplay_device (d=0x3ee200) at redisplay.c:5501 #13 0x1a4d2c in redisplay_without_hooks () at redisplay.c:5617 #14 0x1a4f64 in redisplay () at redisplay.c:5685 #15 0xfbe68 in Fnext_event (event=543365704, prompt=-1606610940) at event-stream.c:2238 #16 0x71ab8 in Fcommand_loop_1 () at cmdloop.c:570 #17 0x71708 in command_loop_1 (dummy=-1606610940) at cmdloop.c:494 #18 0x98fb0 in condition_case_1 (handlers=3743744, bfun=0x71664 <command_loop_1>, barg=-1606610940, hfun=0x71c58 <cmd_error>, harg=-1606610940) at eval.c:1653 #19 0x71d6c in command_loop_2 (dummy=-1606610940) at cmdloop.c:256 #20 0x98ba0 in internal_catch (tag=-1606532996, func=0x71d20 <command_loop_2>, arg=-1606610940, threw=0x0) at eval.c:1328 #21 0x70da0 in initial_command_loop (load_me=466208) at cmdloop.c:305 #22 0x94c6c in xemacs_21_0_b60_sparc_sun_solaris2_5_1 (argc=1, argv=0xefffe94c, envp=0xefffe954, restart=0) at emacs.c:1705 #23 0x95420 in main (argc=0, argv=0xefffe94c, envp=0xefffe954) at emacs.c:2122 Ray