Re: Recipe for disaster - reproducible crash

"Paul Stodghill" <stodghil(a)cs.cornell.edu&gt; writes: Jarl Friis <jarl(a)diku.dk&gt; writes: Please, please _always_ provide backtraces when crashing on Unix boxes.. However in this I can see it myself... Program received signal SIGSEGV, Segmentation fault. 0x818705e in generate_modeline (w=0x85bd8f0, dl=0x85c10e8, type=2) at /local/xemacs/trunk/src/redisplay.c:3654 3654 font_inst = WINDOW_FACE_CACHEL_FONT (w, MODELINE_INDEX, Vcharset_ascii); (gdb) where #0 0x818705e in generate_modeline (w=0x85bd8f0, dl=0x85c10e8, type=2) at /local/xemacs/trunk/src/redisplay.c:3654 #1 0x8188093 in ensure_modeline_generated (w=0x85bd8f0, type=2) at /local/xemacs/trunk/src/redisplay.c:4217 #2 0x8189204 in regenerate_window (w=0x85bd8f0, start_pos=1, point=1, type=2) at /local/xemacs/trunk/src/redisplay.c:5122 #3 0x818da8b in update_line_start_cache (w=0x85bd8f0, from=1, to=168, point=1, no_regen=0) at /local/xemacs/trunk/src/redisplay.c:7967 #4 0x818c7c3 in point_in_line_start_cache (w=0x85bd8f0, point=1, min_past=0) at /local/xemacs/trunk/src/redisplay.c:7277 #5 0x818cda4 in point_would_be_visible (w=0x85bd8f0, startp=1, point=397) at /local/xemacs/trunk/src/redisplay.c:7454 #6 0x81e76cc in Fpos_visible_in_window_p (pos=795, window=140237040) at /local/xemacs/trunk/src/window.c:1324 #7 0x80bd4da in Ffuncall (nargs=3, args=0xbfffe520) at /local/xemacs/trunk/src/eval.c:3477 #8 0x8091e0e in execute_optimized_program ( Note in this context that /* #### This can be referenced by various functions, but face_cachels isn't initialized for the stream device. Since it doesn't need the value we just return nil here to avoid blowing up in multiple places. */ #define WINDOW_FACE_CACHEL_FONT(window, index, charset) \ ((window)->face_cachels \ ? FACE_CACHEL_FONT (WINDOW_FACE_CACHEL (window, index), charset) \ And indeed (window)->face_cachels is not 0, but an empty array. Jan