FYI: Solaris 2.5.1, X11R6.3, gcc 2.7.2 I was running with sparcworks on xemacs. I moved the scrollbar on one of the source windows and got the following crash. The lisp backtrace is: scrollbar-line-up(#<window on "parake20.f" 0xc9e>) # (condition-case ... . error) # (catch top-level ...) The C backtrace is below. Ray #0 0xeeff452c in kill () #1 0x78f98 in fatal_error_signal (sig=11) at emacs.c:262 #2 <signal handler called> #3 0x12404c in add_margin_runes (dl=0x76e120, db=0x989bd0, start=19, count=1, layout=GL_OUTSIDE_MARGIN, side=2, window=540227584) at redisplay.c:2721 #4 0x124878 in create_left_glyph_block (w=0x333800, dl=0x76e120, overlay_width=10060308) at redisplay.c:3052 #5 0x11fec0 in generate_display_line (w=0x333800, dl=0x76e120, bounds=48049, start_pos=47991, start_col=2841600, prop=0xefffdd04, type=2) at redisplay.c:739 #6 0x127178 in regenerate_window (w=0x333800, start_pos=47991, point=3356680, type=2) at redisplay.c:4253 #7 0x12bdc8 in update_line_start_cache (w=0x333800, from=47912, to=48837, point=47914, no_regen=0) at redisplay.c:7024 #8 0x12afa4 in point_in_line_start_cache (w=0x333800, point=47914, min_past=1) at redisplay.c:6480 #9 0xfa65c in vmotion_1 (w=0x333800, orig=47914, vtarget=-1, ret_vpos=0xefffdfb8, ret_vpix=0x0) at indent.c:569 #10 0xfaa04 in vmotion (w=0x333800, orig=47914, vtarget=-1, ret_vpos=0xefffdfb8) at indent.c:649 #11 0x1807c8 in window_scroll (window=540227584, n=1, direction=-1, errb=ERROR_ME_NOT) at window.c:4051 #12 0x90d98 in Fscrollbar_line_up (window=540227584) at scrollbar.c:700 #13 0x8173c in funcall_recording_as (recorded_as=-1607428388, nargs=1, args=0xefffe188) at eval.c:3197 #14 0x82fa0 in call1 (fn=-1607428388, arg0=540227584) at eval.c:3238 #15 0xbd7a0 in execute_command_event (command_builder=0x470380, event=546978260) at event-stream.c:4341 #16 0xbe070 in Fdispatch_event (event=546978260) at event-stream.c:4685 #17 0x61150 in Fcommand_loop_1 () at cmdloop.c:579 #18 0x60f60 in command_loop_1 (dummy=-1607540732) at cmdloop.c:494 #19 0x7ddd8 in condition_case_1 (handlers=-1607540636, bfun=0x60f3c <command_loop_1>, barg=-1607540732, hfun=0x612dc <cmd_error>, harg=-1607540732) at eval.c:1653 #20 0x613f0 in command_loop_2 (dummy=-1607540732) at cmdloop.c:256 #21 0x7dbbc in internal_catch (tag=-1607462812, func=0x613a4 <command_loop_2>, arg=-1607540732, threw=0x0) at eval.c:1328 #22 0x60b70 in initial_command_loop (load_me=398244) at cmdloop.c:305 #23 0x7a86c in xemacs_21_0_sparc_sun_solaris2_5_1 (argc=1, argv=0xefffe884, envp=0xefffe88c, restart=0) at emacs.c:1702 #24 0x7afc4 in main (argc=0, argv=0xefffe884, envp=0xefffe88c) at emacs.c:2119