From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andy Moreton Newsgroups: gmane.emacs.devel Subject: Re: emacs-21.1.94 crash in gnus on Windows Date: Tue, 16 Mar 2010 12:53:51 +0000 Message-ID: <4B9F7F5F.1040504@gmail.com> References: <84634x887o.fsf@gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1268751460 31930 80.91.229.12 (16 Mar 2010 14:57:40 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 16 Mar 2010 14:57:40 +0000 (UTC) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Mar 16 15:57:35 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1NrYCr-0004S4-0d for ged-emacs-devel@m.gmane.org; Tue, 16 Mar 2010 15:57:19 +0100 Original-Received: from localhost ([127.0.0.1]:49553 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NrYCp-00017u-UF for ged-emacs-devel@m.gmane.org; Tue, 16 Mar 2010 10:57:15 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NrWHg-0002MH-JF for emacs-devel@gnu.org; Tue, 16 Mar 2010 08:54:08 -0400 Original-Received: from [140.186.70.92] (port=38270 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NrWHc-0002IG-L6 for emacs-devel@gnu.org; Tue, 16 Mar 2010 08:54:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NrWHa-0004PE-Tc for emacs-devel@gnu.org; Tue, 16 Mar 2010 08:54:04 -0400 Original-Received: from fg-out-1718.google.com ([72.14.220.158]:31798) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NrWHT-0004O8-9o; Tue, 16 Mar 2010 08:53:55 -0400 Original-Received: by fg-out-1718.google.com with SMTP id e12so1702273fga.12 for ; Tue, 16 Mar 2010 05:53:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=A/1JLrgWd8QRVEfddn/GTSzMBew3KzBA88N3shc+Z3w=; b=vacE4Txaf8Oj+Fa9DoenbNp2hO5yh08dQBH736PUkhakJTiaNqKJ8Abtolj7DrfSuk LYHx63bHzeyoJdHLyZtq4+M+k2gt7VkOBCs0UDr3ppz8T8vpekVJZdk/P4J1VEbHK4n2 EZuYKsH6u8OCgSVBq5XXd/msAsw+jAgFXz6jM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=CFRa+utT/BwRvdyydoF6uPNRatDvMUS/DOKHfUT+Qt+/ZGo8TXg7X0ix90nEyhMyn6 Ui9ONfqYHo1/ClAdrEaAwOBCJmfxRfoIjHlwBAcsERIomNr+926QbwoL2C/+3r4Fin+f /xIL3LQiiYrwtFMk02Vme4uOXrqGUb0GUtmVw= Original-Received: by 10.102.169.39 with SMTP id r39mr7030746mue.126.1268744033591; Tue, 16 Mar 2010 05:53:53 -0700 (PDT) Original-Received: from [10.17.20.82] (82-69-137-158.dsl.in-addr.zen.co.uk [82.69.137.158]) by mx.google.com with ESMTPS id b9sm26616920mug.13.2010.03.16.05.53.51 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 16 Mar 2010 05:53:52 -0700 (PDT) User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.1.8) Gecko/20100227 Lightning/1.0b1 Thunderbird/3.0.3 In-Reply-To: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Mailman-Approved-At: Tue, 16 Mar 2010 10:57:01 -0400 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:122058 Archived-At: On 16/03/2010 10:33, Eli Zaretskii wrote: >> From: Andy Moreton >> Date: Mon, 15 Mar 2010 23:40:27 +0000 >> >> I've built 21.1.94 pretest on WinXP SP3 with MinGW gcc, and I'm seeing >> a repeatable crash in gnus. Running emacs under gdb I managed to capture >> a crash, with the following results: >> >> Program received signal SIGSEGV, Segmentation fault. >> 0x0102ef33 in pos_visible_p (w=0x2fa6e00, charpos=0x22fa, x=0x82eef8, y=0x82eef4, rtop=0x82ef08, >> rbot=0x82ef04, rowh=0x82ef00, vpos=0x82eefc) at xdisp.c:1397 >> 1397&& (!BUFFERP (glyph->object) > > Thank you for your report. > >> Please let me know what other info/testing is needed to help fix this. > > First, please file a bug report with this information. I've sent a bug report (from another machine after recreating the crash). > Second, please type "bt full" and post the results. > > Third, if this is an optimized build, please build Emacs without > optimizations, and when the crash happens again, please type "bt full" > and send the results. > > Finally, could you tell what kind of text is at character position > (in this case, 0x22fa) with which pos_visible_p is called when it > crashes? Are there any unusual text properties there, like invisible > text, ellipsis (which stands for hidden text), or something similar? emacs was configured on both machines with "--no-opt". I've added details of the crash in the bug report below. Program received signal SIGSEGV, Segmentation fault. 0x01030355 in pos_visible_p (w=0x307c800, charpos=0x5ad, x=0x82f0c4, y=0x82f0c0, rtop=0x82f0d8, rbot=0x82f0d4, rowh=0x82f0d0, vpos=0x82f0cc) at xdisp.c:1396 1396 for (; glyph < end (gdb) warning: reader_thread.SetEvent failed with 6 for fd -1 warning: reader_thread.SetEvent failed with 6 for fd -1 warning: reader_thread.SetEvent failed with 6 for fd -1 warning: reader_thread.SetEvent failed with 6 for fd -1 warning: reader_thread.SetEvent failed with 6 for fd -1 bt full Reading in symbols for window.c...done. Reading in symbols for eval.c...done. Reading in symbols for bytecode.c...done. Reading in symbols for callint.c...done. Reading in symbols for keyboard.c...done. #0 0x01030355 in pos_visible_p (w=0x307c800, charpos=0x5ad, x=0x82f0c4, y=0x82f0c0, rtop=0x82f0d8, rbot=0x82f0d4, rowh=0x82f0d0, vpos=0x82f0cc) at xdisp.c:1396 row = 0x380a098 glyph = 0x38d0020 end = 0x38d0ea0 x = 0x0 window = 0x307c805 prop = 0x33fb62a top_y = 0x62 it_method = GET_FROM_BUFFER window_top_y = 0xe top_x = 0x333 bottom_y = 0x70 it = { window = 0x307c805, w = 0x307c800, f = 0x307c000, method = GET_FROM_BUFFER, stop_charpos = 0x719, end_charpos = 0x719, s = 0x0, string_nchars = 0x0, region_beg_charpos = 0xffffffff, region_end_charpos = 0xffffffff, redisplay_end_trigger_charpos = 0x0, multibyte_p = 0x1, header_line_p = 0x1, string_from_display_prop_p = 0x0, ellipsis_p = 0x0, avoid_cursor_p = 0x0, dp = 0x48b4e00, dpvec = 0x0, dpend = 0x13da13c, dpvec_char_len = 0x0, dpvec_face_id = 0xffffffff, saved_face_id = 0x0, ctl_chars = {0x0 }, start = { pos = { charpos = 0x1, bytepos = 0x1 }, overlay_string_index = 0xffffffff, string_pos = { charpos = 0xffffffff, bytepos = 0xffffffff }, dpvec_index = 0xffffffff }, current = { pos = { charpos = 0x719, bytepos = 0x759 }, overlay_string_index = 0xffffffff, string_pos = { charpos = 0xffffffff, bytepos = 0xffffffff }, dpvec_index = 0xffffffff }, n_overlay_strings = 0x0, overlay_strings = {0x0 }, string_overlays = {0x0 }, string = 0x2b36802, from_overlay = 0x0, stack = {{ string = 0x0, string_nchars = 0x0, end_charpos = 0x0, stop_charpos = 0x0, cmp_it = { stop_pos = 0x0, id = 0x0, ch = 0x0, lookback = 0x0, nglyphs = 0x0, nchars = 0x0, nbytes = 0x0, from = 0x0, to = 0x0, width = 0x0 }, face_id = 0x0, u = { image = { object = 0x0, slice = { x = 0x0, y = 0x0, width = 0x0, height = 0x0 }, image_id = 0x0 }, comp = { object = 0x0 }, stretch = { object = 0x0 } }, position = { charpos = 0x0, bytepos = 0x0 }, current = { pos = { charpos = 0x0, bytepos = 0x0 }, overlay_string_index = 0x0, string_pos = { charpos = 0x0, bytepos = 0x0 }, dpvec_index = 0x0 }, from_overlay = 0x0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0x0, string_from_display_prop_p = 0x0, display_ellipsis_p = 0x0, avoid_cursor_p = 0x0, line_wrap = TRUNCATE, voffset = 0x0, space_width = 0x0, font_height = 0x0 }, { string = 0x0, string_nchars = 0x0, end_charpos = 0x0, stop_charpos = 0x0, cmp_it = { stop_pos = 0x0, id = 0x0, ch = 0x0, lookback = 0x0, nglyphs = 0x0, nchars = 0x0, nbytes = 0x0, from = 0x0, to = 0x0, width = 0x0 }, face_id = 0x0, u = { image = { object = 0x0, slice = { x = 0x0, y = 0x0, width = 0x0, height = 0x0 }, image_id = 0x0 }, comp = { object = 0x0 }, stretch = { object = 0x0 } }, position = { charpos = 0x0, bytepos = 0x0 }, current = { pos = { charpos = 0x0, bytepos = 0x0 }, overlay_string_index = 0x0, string_pos = { charpos = 0x0, bytepos = 0x0 }, dpvec_index = 0x0 }, from_overlay = 0x0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0x0, string_from_display_prop_p = 0x0, display_ellipsis_p = 0x0, avoid_cursor_p = 0x0, line_wrap = TRUNCATE, voffset = 0x0, space_width = 0x0, font_height = 0x0 }, { string = 0x0, string_nchars = 0x0, end_charpos = 0x0, stop_charpos = 0x0, cmp_it = { stop_pos = 0x0, id = 0x0, ch = 0x0, lookback = 0x0, nglyphs = 0x0, nchars = 0x0, nbytes = 0x0, from = 0x0, to = 0x0, width = 0x0 }, face_id = 0x0, u = { image = { object = 0x0, slice = { x = 0x0, y = 0x0, width = 0x0, height = 0x0 }, image_id = 0x0 }, comp = { object = 0x0 }, stretch = { object = 0x0 } }, position = { charpos = 0x0, bytepos = 0x0 }, current = { pos = { charpos = 0x0, bytepos = 0x0 }, overlay_string_index = 0x0, string_pos = { charpos = 0x0, bytepos = 0x0 }, dpvec_index = 0x0 }, from_overlay = 0x0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0x0, string_from_display_prop_p = 0x0, display_ellipsis_p = 0x0, avoid_cursor_p = 0x0, line_wrap = TRUNCATE, voffset = 0x0, space_width = 0x0, font_height = 0x0 }, { string = 0x0, string_nchars = 0x0, end_charpos = 0x0, stop_charpos = 0x0, cmp_it = { stop_pos = 0x0, id = 0x0, ch = 0x0, lookback = 0x0, nglyphs = 0x0, nchars = 0x0, nbytes = 0x0, from = 0x0, to = 0x0, width = 0x0 }, face_id = 0x0, u = { image = { object = 0x0, slice = { x = 0x0, y = 0x0, width = 0x0, height = 0x0 }, image_id = 0x0 }, comp = { object = 0x0 }, stretch = { object = 0x0 } }, position = { charpos = 0x0, bytepos = 0x0 }, current = { pos = { charpos = 0x0, bytepos = 0x0 }, overlay_string_index = 0x0, string_pos = { charpos = 0x0, bytepos = 0x0 }, dpvec_index = 0x0 }, from_overlay = 0x0, area = LEFT_MARGIN_AREA, method = GET_FROM_BUFFER, multibyte_p = 0x0, string_from_display_prop_p = 0x0, display_ellipsis_p = 0x0, avoid_cursor_p = 0x0, line_wrap = TRUNCATE, voffset = 0x0, space_width = 0x0, font_height = 0x0 }}, sp = 0x0, selective = 0x0, what = IT_CHARACTER, face_id = 0x0, selective_display_ellipsis_p = 0x0, ctl_arrow_p = 0x1, face_box_p = 0x0, start_of_box_run_p = 0x0, end_of_box_run_p = 0x0, overlay_strings_at_end_processed_p = 0x0, ignore_overlay_strings_at_pos_p = 0x0, glyph_not_available_p = 0x0, starts_in_middle_of_char_p = 0x0, face_before_selective_p = 0x0, constrain_row_ascent_descent_p = 0x0, line_wrap = TRUNCATE, base_face_id = 0x0, c = 0xa, len = 0x1, cmp_it = { stop_pos = 0x719, id = 0xffffffff, ch = 0xfffffffe, lookback = 0x0, nglyphs = 0x0, nchars = 0x0, nbytes = 0x0, from = 0x0, to = 0x0, width = 0x0 }, char_to_display = 0x20, image_id = 0x0, slice = { x = 0x2b36802, y = 0x2b36802, width = 0x2b36802, height = 0x2b36802 }, space_width = 0x2b36802, voffset = 0x0, tab_width = 0x8, font_height = 0x2b36802, object = 0x48b4005, position = { charpos = 0x718, bytepos = 0x758 }, truncation_pixel_width = 0x0, continuation_pixel_width = 0x0, first_visible_x = 0x0, last_visible_x = 0x333, last_visible_y = 0x134, extra_line_spacing = 0x0, max_extra_line_spacing = 0x0, override_ascent = 0xffffffff, override_descent = 0x0, override_boff = 0x0, glyph_row = 0x380a098, area = TEXT_AREA, nglyphs = 0x1, pixel_width = 0x7, ascent = 0xb, descent = 0x3, max_ascent = 0xb, max_descent = 0x3, phys_ascent = 0xb, phys_descent = 0x3, max_phys_ascent = 0xb, max_phys_descent = 0x3, current_x = 0x333, continuation_lines_width = 0x0, current_y = 0x62, first_vpos = 0x1, vpos = 0x6, hpos = 0x75, left_user_fringe_bitmap = 0x0, right_user_fringe_bitmap = 0x0, left_user_fringe_face_id = 0x0, right_user_fringe_face_id = 0x0 } top = { charpos = 0x1, bytepos = 0x1 } visible_p = 0x1 old_buffer = 0x0 #1 0x010d0859 in Fpos_visible_in_window_p (pos=0x16b4, window=0x307c805, partially=0x2b36802) at window.c:352 w = 0x307c800 posint = 0x5ad buf = 0x48b4000 top = { charpos = 0x1, bytepos = 0x1 } in_window = 0x2b36802 rtop = 0x48b4000 rbot = 0x2b6d0f0 rowh = 0x2b638c2 vpos = 0x119bf77 fully_p = 0x1 x = 0x1 y = 0x48b4000 #2 0x010234f7 in Ffuncall (nargs=0x3, args=0x82f1b0) at eval.c:3030 fun = 0x138e5fd original_fun = 0x2b69c92 funcar = 0x1 numargs = 0x2 lisp_numargs = 0x10a6d98 val = 0x4 backtrace = { next = 0x82f380, function = 0x82f1b0, args = 0x82f1b4, nargs = 0x2, evalargs = 0x0, debug_on_exit = 0x0 } internal_args = 0x82f110 i = 0x3 #3 0x0116962f in Fbyte_code (bytestr=0x37e15b1, vector=0x3988605, maxdepth=0x10) at bytecode.c:680 count = 0xd op = 0x2 vectorp = 0x3988608 bytestr_length = 0xae stack = { pc = 0x33c6c06 "„†", top = 0x82f1b8, bottom = 0x82f1b0, byte_string = 0x37e15b1, byte_string_start = 0x33c6b90 "\b…­", constants = 0x3988605, next = 0x82f4f0 } top = 0x82f1b0 result = 0x0 #4 0x01023be1 in funcall_lambda (fun=0x39a4005, nargs=0x0, arg_vector=0x82f3e8) at eval.c:3211 val = 0x6e44 syms_left = 0x2b36802 next = 0x2b8f582 count = 0xd i = 0x0 optional = 0x0 rest = 0x0 #5 0x010236c0 in Ffuncall (nargs=0x1, args=0x82f3e4) at eval.c:3070 fun = 0x39a4005 original_fun = 0x399bc02 funcar = 0x395c3a6 numargs = 0x0 lisp_numargs = 0x101a6d7 val = 0x6e44 backtrace = { next = 0x82f5b0, function = 0x82f3e4, args = 0x82f3e8, nargs = 0x0, evalargs = 0x0, debug_on_exit = 0x0 } internal_args = 0x82f3e8 i = 0x3c40ea3 #6 0x0116962f in Fbyte_code (bytestr=0x37f4ee1, vector=0x39aae05, maxdepth=0x10) at bytecode.c:680 count = 0xd op = 0x0 vectorp = 0x39aae08 bytestr_length = 0x73 stack = { pc = 0x33c8060 "ˆ\016\030ƒi", top = 0x82f3e4, bottom = 0x82f3e0, byte_string = 0x37f4ee1, byte_string_start = 0x33c800c "Æ\b!ƒ\021", constants = 0x39aae05, next = 0x82f730 } top = 0x82f3e4 result = 0x0 #7 0x01023be1 in funcall_lambda (fun=0x39a9885, nargs=0x1, arg_vector=0x82f614) at eval.c:3211 val = 0x2b36802 syms_left = 0x2b36802 next = 0x399bf1a count = 0xb i = 0x1 optional = 0x1 rest = 0x0 #8 0x010236c0 in Ffuncall (nargs=0x2, args=0x82f610) at eval.c:3070 fun = 0x39a9885 original_fun = 0x399bf02 funcar = 0x2b6919b numargs = 0x1 lisp_numargs = 0x101a6d7 val = 0x82f5f8 backtrace = { next = 0x82f7f0, function = 0x82f610, args = 0x82f614, nargs = 0x1, evalargs = 0x0, debug_on_exit = 0x0 } internal_args = 0x2b36802 i = 0x3a8cc93 #9 0x0116962f in Fbyte_code (bytestr=0x37f8691, vector=0x39a3a05, maxdepth=0x14) at bytecode.c:680 count = 0x8 op = 0x1 vectorp = 0x39a3a08 bytestr_length = 0xf8 stack = { pc = 0x33c869a "ˆ\202ñ", top = 0x82f614, bottom = 0x82f610, byte_string = 0x37f8691, byte_string_start = 0x33c8628 "p\020Æ ˆÇ`È\"‰\031ƒ\022", constants = 0x39a3a05, next = 0x0 } top = 0x82f610 result = 0x82f4f4 #10 0x01023be1 in funcall_lambda (fun=0x39a9265, nargs=0x1, arg_vector=0x82f8a4) at eval.c:3211 val = 0x0 syms_left = 0x2b36802 next = 0x2b60c4a count = 0x5 i = 0x1 optional = 0x1 rest = 0x0 #11 0x010236c0 in Ffuncall (nargs=0x2, args=0x82f8a0) at eval.c:3070 fun = 0x39a9265 original_fun = 0x3967f7a funcar = 0x2b36802 numargs = 0x1 lisp_numargs = 0x1005b99 val = 0x82f838 backtrace = { next = 0x82fab0, function = 0x82f8a0, args = 0x82f8a4, nargs = 0x1, evalargs = 0x0, debug_on_exit = 0x0 } internal_args = 0x82f808 i = 0x2b36802 #12 0x01168b17 in Fcall_interactively (function=0x3967f7a, record_flag=0x2b36802, keys=0x2b3bb05) at callint.c:869 val = 0x2cadb45 args = 0x82f8a0 visargs = 0x82f880 specs = 0x37fb191 filter_specs = 0x37fb191 teml = 0x11f25dd up_event = 0x2b36802 enable = 0x2b36802 speccount = 0x3 next_event = 0x1 prefix_arg = 0x2b36802 string = 0x82f8c0 "P" tem = 0x13a6b5c "" varies = 0x82f860 i = 0x2 j = 0x1 count = 0x1 foo = 0x3a73dce prompt1 = '\000' tem1 = 0x0 arg_from_tty = 0x0 gcpro1 = { next = 0x2b41e42, var = 0x2b36802, nvars = 0x2b36802 } gcpro2 = { next = 0x2b41e42, var = 0x2b41522, nvars = 0x82f9b8 } gcpro3 = { next = 0x2bcb366, var = 0x2b41522, nvars = 0x2 } gcpro4 = { next = 0x2bcb37e, var = 0x2b36802, nvars = 0x2 } gcpro5 = { next = 0x4905268, var = 0x2b36802, nvars = 0x2b36802 } key_count = 0x1 record_then_fail = 0x0 save_this_command = 0x3967f7a save_last_command = 0x3967fda save_this_original_command = 0x3967f7a save_real_this_command = 0x3967f7a #13 0x010234f7 in Ffuncall (nargs=0x4, args=0x82fb20) at eval.c:3030 fun = 0x139132d original_fun = 0x2b5b5ca funcar = 0x2b57b33 numargs = 0x3 lisp_numargs = 0x101ac15 val = 0x82fb18 backtrace = { next = 0x0, function = 0x82fb20, args = 0x82fb24, nargs = 0x3, evalargs = 0x0, debug_on_exit = 0x0 } internal_args = 0x82fb24 i = 0x2b41a12 #14 0x0102308f in call3 (fn=0x2b5b5ca, arg1=0x3967f7a, arg2=0x2b36802, arg3=0x2b36802) at eval.c:2850 ret_ungc_val = 0x102422a gcpro1 = { next = 0x35fc086, var = 0x2b36802, nvars = 0x4 } args = {0x2b5b5ca, 0x3967f7a, 0x2b36802, 0x2b36802} #15 0x01014f36 in Fcommand_execute (cmd=0x3967f7a, record_flag=0x2b36802, keys=0x2b36802, special=0x2b36802) at keyboard.c:10507 final = 0x39a9265 tem = 0x2b36802 prefixarg = 0x2b36802 #16 0x0100787b in command_loop_1 () at keyboard.c:1904 scount = 0x2 cmd = 0x3967f7a lose = 0x82fcd8 keybuf = {0x80, 0x144, 0x82fc98, 0x1197215, 0x1000, 0x1bc, 0x30a8, 0x2b54a00, 0x2, 0x0, 0x2, 0x2, 0x0, 0x2, 0x82fde0, 0x0, 0x0, 0x82fcb4, 0x82fb50, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2b36802, 0x2c0a702} i = 0x1 prev_modiff = 0x62 prev_buffer = 0x48b4000 already_adjusted = 0x0 #17 0x01020fc4 in internal_condition_case (bfun=0x10061fd , handlers=0x2b444da, hfun=0x1005bee ) at eval.c:1490 val = 0x31f77de c = { tag = 0x2b36802, val = 0x2b36802, next = 0x82fde0, gcpro = 0x0, jmp = {0x82fda8, 0x7ffde000, 0x65002e, 0x650078, 0x82fcdc, 0x1020f5c, 0x82ffe0, 0x0, 0x82fdd8, 0x3, 0x1, 0x82fde4, 0x77c30065, 0x0, 0x1, 0xa452f0}, backlist = 0x0, handlerlist = 0x0, lisp_eval_depth = 0x0, pdlcount = 0x2, poll_suppress_count = 0x0, interrupt_input_blocked = 0x0, byte_stack = 0x0 } h = { handler = 0x2b444da, var = 0x2b36802, chosen_clause = 0x82fde4, tag = 0x82fd20, next = 0x0 } #18 0x01005f62 in command_loop_2 () at keyboard.c:1360 val = 0x0 #19 0x01020ab5 in internal_catch (tag=0x2b441b2, func=0x1005f3f , arg=0x2b36802) at eval.c:1226 c = { tag = 0x2b441b2, val = 0x2b36802, next = 0x0, gcpro = 0x0, jmp = {0x82fe58, 0x7ffde000, 0x65002e, 0x650078, 0x82fdcc, 0x1020aa6, 0x82ffe0, 0x0, 0x2b69aea, 0x2b691cb, 0x2b36802, 0x2b40000, 0x2f2a5f4, 0x2b36802, 0x82fe48, 0x2b691cb}, backlist = 0x0, handlerlist = 0x0, lisp_eval_depth = 0x0, pdlcount = 0x2, poll_suppress_count = 0x0, interrupt_input_blocked = 0x0, byte_stack = 0x0 } #20 0x01005f18 in command_loop () at keyboard.c:1339 No locals. #21 0x0100580a in recursive_edit_1 () at keyboard.c:954 count = 0x1 val = 0x82feb0 #22 0x0100596e in Frecursive_edit () at keyboard.c:1016 count = 0x0 buffer = 0x2b36802 #23 0x010027c6 in main (argc=0x1, argv=0xa42678) at emacs.c:1833 dummy = 0x7ffde000 stack_bottom_variable = 0x7f do_initial_setlocale = 0x1 skip_args = 0x0 no_loadup = 0x0 junk = 0x0 dname_arg = 0x0 Lisp Backtrace: "pos-visible-in-window-p" (0x82f1b4) "gnus-summary-recenter" (0x82f3e8) "gnus-summary-display-article" (0x82f614) "gnus-summary-next-page" (0x82f8a4) "call-interactively" (0x82fb24) (gdb) (gdb) (gdb) frame #0 0x01030355 in pos_visible_p (w=0x307c800, charpos=0x5ad, x=0x82f0c4, y=0x82f0c0, rtop=0x82f0d8, rbot=0x82f0d4, rowh=0x82f0d0, vpos=0x82f0cc) at xdisp.c:1396 1396 for (; glyph < end (gdb) p rowh $1 = (int *) 0x82f0d0 (gdb) prow y=14 x=0 pwid=819 a+d=11+3=14 phys=11+3=14 vis=14 L=0 T=117 R=0 start=1 end=122 DISP TRUNC:R (gdb) p w $2 = (struct window *) 0x307c800 (gdb) pwin Window 1 *Summary nntp+news.gmane.org:gmane.text.xml.schema.devel* start=1 end:pos=0 vpos=3 vscroll=0 cursor: y=14 x=273 vpos=1 hpos=39 phys: y=14 x=273 vpos=1 hpos=39 ON blk=OFF (gdb) p glyph $3 = (struct glyph *) 0x38d0020 (gdb) pg STRETCH[0+0] pos=0 w=5 a+d=0+0 face=47 vof=909 N/A OVL [ slice=24,909,0,0 (gdb) -------------------------------------------------------------------------------- With charpos=0x5ad in the trace above, I ran gnus again and opened the summary buffer for the same group. Doing 'M-x goto-char 1453' puts point on '...' in the summary buffer, and 'M-x describe char' shows: character: C-j (10, #o12, #xa) preferred charset: ascii (ASCII (ISO646 IRV)) code point: 0x0A syntax: which means: whitespace buffer code: #x0A file code: #x0A (encoded by coding system utf-8-dos) display: by this font (glyph code) uniscribe:-outline-DejaVu Sans Mono-normal-normal-normal-mono-12-*-*-*-c-*-iso8859-1 (#x03) Character code properties: customize what to show name: old-name: LINE FEED (LF) general-category: Cc (Other, Control) There is an overlay here: From 1453 to 1816 evaporate t invisible gnus-sum There are text properties here: gnus-number 7068 --------------------------------------------------------------------------------