From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Helmut Eller Newsgroups: gmane.emacs.bugs Subject: bug#9436: 24.0.50; Segmentation fault during redisplay Date: Mon, 05 Sep 2011 00:35:34 +0200 Message-ID: References: <83d3fgyxqi.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1315175799 24499 80.91.229.12 (4 Sep 2011 22:36:39 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 4 Sep 2011 22:36:39 +0000 (UTC) To: 9436@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Sep 05 00:36:35 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1R0LIl-00075n-Tr for geb-bug-gnu-emacs@m.gmane.org; Mon, 05 Sep 2011 00:36:32 +0200 Original-Received: from localhost ([::1]:48425 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1R0LIl-0004FN-FK for geb-bug-gnu-emacs@m.gmane.org; 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As far as I can tell, I don't do anything unusual when it >> happens: just reading and moving up and down with the cursor keys. This >> happened in c-mode, lisp-mode and I think even in man-mode. >> >> I now start Emacs with (ulimit -c unlimited && emacs)& and have a core >> file. The output of "bt full" is below. xbacktrace didn't show >> anything, but I'm not sure if I sourced the .gdbinit correctly. > > Please try reproducing this in an unoptimized build. Backtraces from > optimized builds are useless for debugging. It looks like it->f is > NULL in frames #4 and therefore in frame #3, which is the cause of the > crash. But I don't believe anything GDB displays in optimized builds, > not even to backtraces. I updated the source tree and configured with `configure '--with-gif=no' '--with-gnutls=no' 'CFLAGS=-g3 -O0'' Then started Emacs from gdb. After a while the it occurred again. it->f seems to be 0 here too: (gdb) frame 0 #0 0x0807e455 in move_it_to (it=0xbfffd9d0, to_charpos=1688, to_x=-1, to_y=-1, to_vpos=-1, op=8) at xdisp.c:8444 8444 if (!FRAME_WINDOW_P (it->f) (gdb) p it->f $5 = (struct frame *) 0x0 (gdb) bt full #0 0x0807e455 in move_it_to (it=0xbfffd9d0, to_charpos=1688, to_x=-1, to_y=-1, to_vpos=-1, op=8) at xdisp.c:8444 skip = MOVE_POS_MATCH_OR_ZV skip2 = MOVE_X_REACHED line_height = 1 line_start_x = 0 reached = 8 backup_data = 0x0 #1 0x080865e7 in redisplay_internal () at xdisp.c:12814 it = { window = -1, w = 0x6, f = 0x0, method = GET_FROM_BUFFER, stop_charpos = 0, prev_stop = 1, base_level_stop = 136838669, end_charpos = 1, s = 0xffffffff
, string_nchars = -1073760376, region_beg_charpos = 1609, region_end_charpos = -1073744212, redisplay_end_trigger_charpos = -1073744812, multibyte_p = 0, header_line_p = 0, string_from_display_prop_p = 0, from_disp_prop_p = 1, ellipsis_p = 1, avoid_cursor_p = 1, dp = 0x80fae0d, dpvec = 0x6, dpend = 0xffffffff, dpvec_char_len = -1073760464, dpvec_face_id = 1, saved_face_id = 0, ctl_chars = {138944994, 150157657, 12, 136837288, 0, -1073761864, 135246822, 1, 141508981, 141508976, 141250424, 2, 5, 0, 0, 5}, start = { pos = { charpos = 0, bytepos = 5 }, overlay_string_index = -1, string_pos = { charpos = -1, bytepos = 0 }, dpvec_index = 0 }, current = { pos = { charpos = 0, bytepos = 0 }, overlay_string_index = 14444, string_pos = { charpos = 138958224, bytepos = 0 }, dpvec_index = 1 }, n_overlay_strings = 0, overlay_strings_charpos = -1073761768, overlay_strings = {135246822, 1, 1, -1073762504, 136593222, 138983032, 0, 0, 0, 1, 1, -1073762472, 136593222, 138983032, 0, -1073762440}, string_overlays = {136594130, 138983032, 0, 139200761, 1, 0, -1, -1073762408, 136594130, 138983032, 0, 0, -1, 138983032, -1073759888, -1073762376}, string = 140390408, from_overlay = -1073751560, stack = {{ string = -1073749372, string_nchars = -1073761624, end_charpos = 134706287, stop_charpos = -1073756228, prev_stop = 0, base_level_stop = -1073762344, cmp_it = { stop_pos = 136608427, id = 138983032, ch = 1, rule_idx = 0, lookback = 140390408, nglyphs = -1073759888, reversed_p = -1073759888, charpos = -1073762200, nchars = 136240313, nbytes = 138944682, from = 138944994, to = 1, width = -1 }, face_id = 138983032, u = { image = { object = 138944682, slice = { x = -1073762312, y = 136615013, width = 138983032, height = 138944994 }, image_id = -1073762304 }, comp = { object = 138944682 }, stretch = { object = 138944682 } }, position = { charpos = 0, bytepos = -1 }, current = { pos = { charpos = -1073759888, bytepos = -1073762152 }, overlay_string_index = 135327545, string_pos = { charpos = 4, bytepos = 138944994 }, dpvec_index = 139200761 }, from_overlay = 4, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, paragraph_embedding = NEUTRAL_DIR, multibyte_p = 0, string_from_display_prop_p = 0, display_ellipsis_p = 1, avoid_cursor_p = 1, bidi_p = 1, from_disp_prop_p = 0, line_wrap = 3221205120, voffset = -20348, space_width = 1, font_height = 0 }, { string = 136964517, string_nchars = 139110394, end_charpos = 0, stop_charpos = 1, prev_stop = 0, base_level_stop = 139109826, cmp_it = { stop_pos = 0, id = 0, ch = 0, rule_idx = 0, lookback = 0, nglyphs = 138944682, reversed_p = -1073760816, charpos = -1073744812, nchars = -1073761704, nbytes = 136500026, from = 2, to = -1073762176, width = 4 }, face_id = 4, u = { image = { object = 139109826, slice = { x = 138944682, y = 0, width = 138944994, height = 1 }, image_id = -1 }, comp = { object = 139109826 }, stretch = { object = 139109826 } }, position = { charpos = -1073759800, bytepos = 134688429 }, current = { pos = { charpos = 141508976, bytepos = 139200761 }, overlay_string_index = 1, string_pos = { charpos = 0, bytepos = -1 }, dpvec_index = 138228139 }, from_overlay = 137565393, area = 138228120, method = 137565413, paragraph_embedding = 3221205940, multibyte_p = 1, string_from_display_prop_p = 1, display_ellipsis_p = 0, avoid_cursor_p = 1, bidi_p = 0, from_disp_prop_p = 0, line_wrap = 135, voffset = 5352, space_width = -1073762180, font_height = 139109826 }, { string = 0, string_nchars = 0, end_charpos = 141508981, stop_charpos = 141508976, prev_stop = 141250424, base_level_stop = 2, cmp_it = { stop_pos = 139110370, id = 138944682, ch = 0, rule_idx = 1, lookback = 0, nglyphs = 1, reversed_p = -1, charpos = -1, nchars = 0, nbytes = 0, from = 141161504, to = 0, width = 0 }, face_id = 0, u = { image = { object = 0, slice = { x = 1, y = 0, width = 0, height = 0 }, image_id = 0 }, comp = { object = 0 }, stretch = { object = 0 } }, position = { charpos = 0, bytepos = 0 }, current = { pos = { charpos = 0, bytepos = 0 }, overlay_string_index = 0, string_pos = { charpos = 0, bytepos = 0 }, dpvec_index = 0 }, from_overlay = 1, area = 136838669, method = GET_FROM_BUFFER, paragraph_embedding = NEUTRAL_DIR, multibyte_p = 0, string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, bidi_p = 0, from_disp_prop_p = 0, line_wrap = 3221206168, voffset = -19482, space_width = 6, font_height = 0 }, { string = 0, string_nchars = 0, end_charpos = 0, stop_charpos = -1, prev_stop = 0, base_level_stop = 0, cmp_it = { stop_pos = -1, id = 0, ch = 0, rule_idx = 0, lookback = 0, nglyphs = 0, reversed_p = 0, charpos = 0, nchars = 0, nbytes = 0, from = 0, to = 0, width = 0 }, face_id = -1, u = { image = { object = 0, slice = { x = 0, y = 0, width = 0, height = 0 }, image_id = 0 }, comp = { object = 0 }, stretch = { object = 0 } }, position = { charpos = 0, bytepos = 0 }, current = { pos = { charpos = 0, bytepos = 0 }, overlay_string_index = 0, string_pos = { charpos = 0, bytepos = 0 }, dpvec_index = 0 }, from_overlay = 0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, paragraph_embedding = 139110370, multibyte_p = 0, string_from_display_prop_p = 1, display_ellipsis_p = 0, avoid_cursor_p = 0, bidi_p = 1, from_disp_prop_p = 0, line_wrap = TRUNCATE, voffset = 0, space_width = 139200761, font_height = 0 }, { string = 0, string_nchars = 0, end_charpos = 0, stop_charpos = 139110368, prev_stop = 138944682, base_level_stop = 0, cmp_it = { stop_pos = 0, id = 0, ch = 138944682, rule_idx = -1073761608, lookback = 136242696, nglyphs = 10, reversed_p = 139109826, charpos = 12, nchars = 138944682, nbytes = 0, from = 0, to = 0, width = 0 }, face_id = 500, u = { image = { object = 0, slice = { x = 139109826, y = 138944682, width = 139110370, height = 138944682 }, image_id = 10 }, comp = { object = 0 }, stretch = { object = 0 } }, position = { charpos = -1073751560, bytepos = -1073749372 }, current = { pos = { charpos = -1073754040, bytepos = -1073760840 }, overlay_string_index = 134708162, string_pos = { charpos = -1073756228, bytepos = -1073760872 }, dpvec_index = -1073761592 }, from_overlay = 136240856, area = 137565365, method = GET_FROM_DISPLAY_VECTOR, paragraph_embedding = 3221205892, multibyte_p = 0, string_from_display_prop_p = 0, display_ellipsis_p = 0, avoid_cursor_p = 0, bidi_p = 0, from_disp_prop_p = 0, line_wrap = TRUNCATE, voffset = 0, space_width = 0, font_height = 0 }}, sp = 0, selective = 0, what = IT_CHARACTER, face_id = 0, selective_display_ellipsis_p = 0, ctl_arrow_p = 0, face_box_p = 0, start_of_box_run_p = 0, end_of_box_run_p = 0, overlay_strings_at_end_processed_p = 0, ignore_overlay_strings_at_pos_p = 0, glyph_not_available_p = 0, starts_in_middle_of_char_p = 0, face_before_selective_p = 0, constrain_row_ascent_descent_p = 0, line_wrap = TRUNCATE, base_face_id = 0, c = 0, len = 0, cmp_it = { stop_pos = 0, id = 0, ch = 0, rule_idx = 0, lookback = 0, nglyphs = 0, reversed_p = -1073760588, charpos = -1073761408, nchars = -1073761404, nbytes = 1, from = 0, to = 137565365, width = 139398234 }, char_to_display = 0, glyphless_method = GLYPHLESS_DISPLAY_EMPTY_BOX, image_id = 0, slice = { x = 139109826, y = 0, width = 0, height = 0 }, space_width = 0, voffset = 0, tab_width = 0, font_height = 138944682, object = -1073760816, position = { charpos = 138944682, bytepos = -1073760936 }, truncation_pixel_width = -12175, continuation_pixel_width = 2082, first_visible_x = 139109826, last_visible_x = 137214326, last_visible_y = 0, extra_line_spacing = 0, max_extra_line_spacing = 138944706, override_ascent = 137214326, override_descent = 0, override_boff = 0, glyph_row = 0x0, area = LEFT_MARGIN_AREA, nglyphs = 0, pixel_width = 0, ascent = 0, descent = 0, max_ascent = 0, max_descent = 0, phys_ascent = 0, phys_descent = 138225669, max_phys_ascent = 137570145, max_phys_descent = 138225661, current_x = 1596, continuation_lines_width = 1597, eol_pos = { charpos = -1073761288, bytepos = 136593222 }, current_y = 150510520, first_vpos = -1073761412, vpos = 138944706, hpos = 0, left_user_fringe_bitmap = 0, right_user_fringe_bitmap = 0, left_user_fringe_face_id = 0, right_user_fringe_face_id = 262333, bidi_p = 1, bidi_it = { bytepos = 1, charpos = 1596, ch = 1597, nchars = -1073761224, ch_len = 136594130, type = 150510520, type_after_w1 = UNKNOWN_BT, orig_type = UNKNOWN_BT, resolved_level = 137214326, invalid_levels = 0, invalid_rl_levels = 0, prev_was_pdf = 148111549, prev = { bytepos = 148111549, charpos = 0, type = UNKNOWN_BT, type_after_w1 = 3221206120, orig_type = 148111544 }, last_strong = { bytepos = 150510520, charpos = 1, type = 3221206136, type_after_w1 = 136608427, orig_type = 150510520 }, next_for_neutral = { bytepos = 1597, charpos = -1073761160, type = 136601414, type_after_w1 = 139114122, orig_type = 138944682 }, prev_for_neutral = { bytepos = 0, charpos = 148111544, type = 150510520, type_after_w1 = STRONG_L, orig_type = 3221206184 }, next_for_ws = { bytepos = 139114122, charpos = 1597, type = 3221208772, type_after_w1 = 3221206168, orig_type = 136601241 }, next_en_pos = 154770238, ignore_bn_limit = 139114122, sor = L2R, scan_dir = 0, disp_pos = 139114122, disp_prop = 1597, stack_idx = -1073761096, level_stack = {{ level = 136611657, override = 154770238 }, { level = 139114122, override = 3221206216 }, { level = 136601241, override = 154770238 }, { level = 139114122, override = 3221206456 }, { level = 136612465, override = 6388 }, { level = 139114122, override = 148111549 }, { level = -1073760872, override = NEUTRAL_DIR }, { level = 0, override = NEUTRAL_DIR }, { level = 0, override = NEUTRAL_DIR }, { level = 139114242, override = 3221206504 }, { level = 136612465, override = 6388 }, { level = 139114242, override = 148111549 }, { level = -1073760824, override = NEUTRAL_DIR }, { level = 0, override = NEUTRAL_DIR }, { level = 1, override = L2R }, { level = 6, override = 6 }, { level = 0, override = 1597 }, { level = 1598, override = 3221206360 }, { level = 136593222, override = 150510520 }, { level = 0, override = NEUTRAL_DIR }, { level = 0, override = 3073496800 }, { level = 155409932, override = 3072615702 }, { level = 136601414, override = 139115002 }, { level = 138944682, override = 3221206424 }, { level = 136594130, override = 150510520 }, { level = 139114122, override = 3221206456 }, { level = 136612085, override = 148111544 }, { level = -1073758524, override = 3221206424 }, { level = 136601241, override = 154770238 }, { level = 139115002, override = 3073496016 }, { level = 2200, override = 3073495968 }, { level = -1221476364, override = NEUTRAL_DIR }, { level = 1, override = 3221206456 }, { level = -1222337603, override = 148111544 }, { level = -1073751560, override = 3221215736 }, { level = -1073749372, override = 3221206552 }, { level = 135848063, override = 139065019 }, { level = 0, override = NEUTRAL_DIR }, { level = 0, override = 139064995 }, { level = 139065139, override = 139065019 }, { level = 0, override = NEUTRAL_DIR }, { level = 5, override = R2L }, { level = 9, override = NEUTRAL_DIR }, { level = 1, override = NEUTRAL_DIR }, { level = 150555784, override = 136212454 }, { level = -1073744812, override = 3221208824 }, { level = -1073756228, override = L2R }, { level = -1073756228, override = 3221208824 }, { level = 134737122, override = 3221215736 }, { level = -1, override = 4294967295 }, { level = -1, override = NEUTRAL_DIR }, { level = 4, override = 141508981 }, { level = 141508976, override = 141250424 }, { level = 0, override = 1698 }, { level = 0, override = NEUTRAL_DIR }, { level = 14444, override = NEUTRAL_DIR }, { level = 0, override = 4294967295 }, { level = -1, override = NEUTRAL_DIR }, { level = 0, override = 141161504 }, { level = 0, override = NEUTRAL_DIR }, { level = 0, override = NEUTRAL_DIR }, { level = 29, override = NEUTRAL_DIR }, { level = 0, override = NEUTRAL_DIR }, { level = 0, override = NEUTRAL_DIR }}, string = { lstring = 0, s = 0x0, schars = 0, bufpos = 0, from_disp_str = 0, unibyte = 0 }, paragraph_dir = NEUTRAL_DIR, separator_limit = 0, first_elt = 0, new_paragraph = 0, frame_window_p = 0 }, paragraph_embedding = NEUTRAL_DIR } row = 0x14 w = 0x86f4170 sw = 0x86f4170 fr = 0x86b4f78 pending = 0 must_finish = 1 tlbufpos = { charpos = 1609, bytepos = 1609 } tlendpos = { charpos = 12737, bytepos = 12737 } number_of_visible_frames = 1 count = 2 count1 = 4 sf = 0x86b4f78 polling_stopped_here = 0 old_frame = 141250429 consider_all_windows_p = 0 #2 0x08084a89 in redisplay () at xdisp.c:12100 No locals. #3 0x0816c326 in read_char (commandflag=1, nmaps=3, maps=0xbfffee20, prev_event=138944682, used_mouse_menu=0xbfffeee8, end_time=0x0) at keyboard.c:2445 echo_current = 1 c = 138944682 jmpcount = 0 local_getcjmp = {{ __jmpbuf = {0, 138966874, 1688, -1073746728, 136611657, 154770238}, __mask_was_saved = 138966874, __saved_mask = { __val = {138944682, 138944682, 0, 138966874, 3221220824, 136171060, 6748, 138966874, 148111549, 0 } } }} save_jump = {{ __jmpbuf = {150510520, 1, -1073746856, 136594130, 150510520, 1688}, __mask_was_saved = -1073746856, __saved_mask = { __val = {136601414, 139114338, 138944682, 3221220472, 148111549, 150510520, 1688, 3221220472, 148111544, 150510520, 1, 3221220504, 136608427, 150510520, 1687, 3221220504, 136601414, 138966874, 138944682, 3221220504, 136611657, 154770238, 139114338, 1, 138966874, 1688, 3221222484, 3221220536, 136601241, 154770238, 138966874, 1} } }} key_already_recorded = 0 tem = 0 save = 0 previous_echo_area_message = 138944682 also_record = 138944682 reread = 0 gcpro1 = { next = 0xbffff454, var = 0xbfffec38, nvars = 148111549 } gcpro2 = { next = 0xbfffec18, var = 0x8243f46, nvars = 150510520 } polling_stopped_here = 0 orig_kboard = 0x85e3da8 #4 0x08177200 in read_key_sequence (keybuf=0xbffff06c, bufsize=30, prompt=138944682, dont_downcase_last=0, can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:9280 interrupted_kboard = 0x85e3da8 interrupted_frame = 0x86b4f78 key = 136612085 used_mouse_menu = 0 echo_local_start = 0 last_real_key_start = 0 keys_local_start = 0 local_first_binding = 0 from_string = 138944682 count = 2 t = 0 echo_start = 0 keys_start = 0 nmaps = 3 nmaps_allocated = 3 defs = 0xbfffee00 submaps = 0xbfffee20 orig_local_map = 148820030 orig_keymap = 138944682 localized_local_map = 0 first_binding = 0 first_unbound = 31 mock_input = 0 fkey = { parent = 142245342, map = 142245342, start = 0, end = 0 } keytran = { parent = 138931910, map = 138931910, start = 0, end = 0 } indec = { parent = 142245398, map = 142245398, start = 0, end = 0 } shift_translated = 0 delayed_switch_frame = 138944682 original_uppercase = 139115002 original_uppercase_position = -1 dummyflag = 0 starting_buffer = 0x8d400b8 fake_prefixed_keys = 138944682 outer_gcpro1 = { next = 0x0, var = 0x0, nvars = 0 } #5 0x0816a788 in command_loop_1 () at keyboard.c:1445 cmd = 149165242 keybuf = {20, 476, 138944682, 138944682, 0, 137018385, -1073745872, 136983886, 0, 137256021, 142346198, -1073745720, 135700646, 146451238, 138944706, -1073745690, 139168218, 139080898, 138944682, 138944682, 141250424, 139080896, 0, -1073745624, 135700220, 146451238, -1073745690, -1073745656, 136234355, 2} i = 1 prev_modiff = 2045 prev_buffer = 0x8d400b8 already_adjusted = 0 #6 0x081eb41b in internal_condition_case (bfun=0x816a431 , handlers=138975698, hfun=0x8169e0e ) at eval.c:1491 val = 142346198 c = { tag = 138944682, val = 138944682, next = 0xbffff268, gcpro = 0x0, jmp = {{ __jmpbuf = {0, -1073744212, -1073744812, -1073745368, 141568975, -889903456}, __mask_was_saved = 0, __saved_mask = { __val = {361, 3072221012, 0, 3221221920, 3221221848, 3221221860, 134548718, 3087005944, 0, 3070780080, 3221159938, 134547728, 134547034, 3075069920, 3087003636, 3072186836, 33, 3221221628, 3086925766, 3221221560, 138889472, 3221222164, 3072204324, 3075069992, 2, 4294967295, 3087003636, 134547728, 1, 3221221936, 3086943782, 3087006384} } }}, backlist = 0x0, handlerlist = 0x0, lisp_eval_depth = 0, pdlcount = 2, poll_suppress_count = 1, interrupt_input_blocked = 0, byte_stack = 0x0 } h = { handler = 138975698, var = 138944682, chosen_clause = 138944706, tag = 0xbffff154, next = 0x0 } #7 0x0816a182 in command_loop_2 (ignore=138944682) at keyboard.c:1156 val = 0 #8 0x081eaeed in internal_catch (tag=138973674, func=0x816a15e , arg=138944682) at eval.c:1248 c = { tag = 138973674, val = 138944682, next = 0x0, gcpro = 0x0, jmp = {{ __jmpbuf = {-1073744096, -1073744212, -1073744812, -1073745096, 142011343, -892340576}, __mask_was_saved = 0, __saved_mask = { __val = {0 , 3072620190, 0, 0, 0, 138944682, 3221222200, 136141186, 138621992, 138944682, 138964424, 136571180, 0, 139132976, 3221222200, 136140015, 138964424} } }}, backlist = 0x0, handlerlist = 0x0, lisp_eval_depth = 0, pdlcount = 2, poll_suppress_count = 1, interrupt_input_blocked = 0, byte_stack = 0x0 } #9 0x0816a13e in command_loop () at keyboard.c:1135 No locals. #10 0x08169a47 in recursive_edit_1 () at keyboard.c:756 count = 1 val = 134926549 #11 0x08169b98 in Frecursive_edit () at keyboard.c:820 count = 0 buffer = 138944682 #12 0x08168112 in main (argc=1, argv=0xbffff7c4) at emacs.c:1702 dummy = -1073744440 stack_bottom_variable = 0 '\000' do_initial_setlocale = 1 skip_args = 0 rlim = { rlim_cur = 8388608, rlim_max = 18446744073709551615 } no_loadup = 0 junk = 0x0 dname_arg = 0x0 ch_to_dir = 0x4e63cd96