Emacs abort

[Martin Fredriksson <m@rfc.se>]

I have now verified the abort also in Linux.  The abort happens when 
invoking outline-minor-mode 'show-all' after a previous 'hide-body', 
when part of the buffer is not visible (scrolled).  The abort only 
happens when using keys, not when invoking with 'M-x show-all'.

The steps to trigger this are:

(1) gdb ./emacs
     (gdb) run -q

(2) Open apa.txt, select outline minor mode (M-x outline-minor-mode) 
and go to end of buffer.

(3) Hide body:
     C-c @ C-t

(4) Go up two lines (previous-line x 2)

(5) Show all (must be done using keys):
     C-c @ C-a

ABORT

In GNU Emacs 22.0.50.1 (i686-pc-linux-gnu, X toolkit)
  of 2005-02-15 on tilin
Distributor `The XFree86 Project, Inc', version 11.0.40300000

Some gdb output below:

Breakpoint 1 at 0x80d953e: file emacs.c, line 454.
Breakpoint 2 at 0x80bcb04: file xterm.c, line 7794.
(gdb) run -q
Starting program: /users/mogf/work/emacs/src/emacs -q

Breakpoint 1, abort () at emacs.c:454
454       kill (getpid (), SIGABRT);
(gdb) bt
#0  abort () at emacs.c:454
#1  0x08072264 in find_first_unchanged_at_end_row (w=0x9b4e548, 
delta=0xbfff8a28, delta_bytes=0xbfff8a2c)
     at xdisp.c:13128
#2  0x08072816 in try_window_id (w=0x84e06e0) at xdisp.c:13559
#3  0x080701e5 in redisplay_window (window=139331300, 
just_this_one_p=1) at xdisp.c:12104
#4  0x0806d24d in redisplay_window_1 (window=139331300) at xdisp.c:10826
#5  0x08135310 in internal_condition_case_1 (bfun=0x806d220 
<redisplay_window_1>, arg=139331300,
     handlers=137296213, hfun=0x806d1d0 <redisplay_window_error>) at 
eval.c:1426
#6  0x0806c736 in redisplay_internal (preserve_echo_area=0) at 
xdisp.c:10448
#7  0x0806b531 in redisplay () at xdisp.c:9609
#8  0x080df1a1 in read_char (commandflag=1, nmaps=3, maps=0xbfff9860, 
prev_event=137269265,
     used_mouse_menu=0xbfff9898) at keyboard.c:2540
#9  0x080e5252 in read_key_sequence (keybuf=0xbfff99d0, bufsize=30, 
prompt=137269265, dont_downcase_last=0,
     can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:8799
#10 0x080dc230 in command_loop_1 () at keyboard.c:1534
#11 0x08135216 in internal_condition_case (bfun=0x80dc0b8 
<command_loop_1>, handlers=137330257,
     hfun=0x80dbc34 <cmd_error>) at eval.c:1385
#12 0x080dbf3e in command_loop_2 () at keyboard.c:1315
#13 0x08134da9 in internal_catch (tag=2048, func=0x80dbf20 
<command_loop_2>, arg=137269265) at eval.c:1144
#14 0x080dbef5 in command_loop () at keyboard.c:1294
#15 0x080db9ec in recursive_edit_1 () at keyboard.c:987
#16 0x080dbb0c in Frecursive_edit () at keyboard.c:1048
#17 0x080da2f7 in main (argc=2, argv=0xbfff9fe4) at emacs.c:1763
(gdb) up 1
#1  0x08072264 in find_first_unchanged_at_end_row (w=0x9b4e548, 
delta=0xbfff8a28, delta_bytes=0xbfff8a2c)
     at xdisp.c:13128
13128       abort ();
(gdb) p row_found
$1 = (struct glyph_row *) 0x0
(gdb) p *row_found
Cannot access memory at address 0x0
(gdb) p row
$2 = (struct glyph_row *) 0x9b4e668
(gdb) p *row_found
Cannot access memory at address 0x0
(gdb) p *row
$3 = {
   glyphs = {0x9a8ff38, 0x9a8ff38, 0x9a91ff8, 0x9a91ff8},
   used = {0, 14, 0},
   x = 0,
   y = 26,
   pixel_width = 84,
   ascent = 11,
   height = 13,
   phys_ascent = 11,
   phys_height = 13,
   visible_height = 13,
   extra_line_spacing = 0,
   hash = 265403400,
   start = {
     pos = {
       charpos = 153,
       bytepos = 153
     },
     overlay_string_index = -1,
     string_pos = {
       charpos = -1,
       bytepos = -1
     },
     dpvec_index = -1
   },
   end = {
     pos = {
       charpos = 244,
       bytepos = 244
     },
     overlay_string_index = -1,
     string_pos = {
       charpos = -1,
       bytepos = -1
     },
     dpvec_index = -1
   },
   left_user_fringe_bitmap = 0,
   right_user_fringe_bitmap = 0,
---Type <return> to continue, or q <return> to quit---
   left_fringe_bitmap = 0,
   right_fringe_bitmap = 0,
   left_user_fringe_face_id = 0,
   right_user_fringe_face_id = 0,
   left_fringe_face_id = 0,
   right_fringe_face_id = 0,
   redraw_fringe_bitmaps_p = 0,
   enabled_p = 0,
   truncated_on_left_p = 0,
   truncated_on_right_p = 0,
   overlay_arrow_p = 0,
   continued_p = 0,
   displays_text_p = 1,
   ends_at_zv_p = 0,
   fill_line_p = 0,
   indicate_empty_line_p = 0,
   contains_overlapping_glyphs_p = 0,
   full_width_p = 0,
   mode_line_p = 0,
   overlapped_p = 0,
   ends_in_middle_of_char_p = 0,
   starts_in_middle_of_char_p = 0,
   overlapping_p = 0,
   mouse_face_p = 0,
   ends_in_newline_from_string_p = 0,
   exact_window_width_line_p = 0,
   cursor_in_fringe_p = 0,
   ends_in_ellipsis_p = 0,
   indicate_bob_p = 0,
   indicate_top_line_p = 0,
   indicate_eob_p = 0,
   indicate_bottom_line_p = 0,
   continuation_lines_width = 0
}
(gdb) p *delta
$4 = 0
(gdb) p *delta_bytes
$5 = 0
(gdb) p *w
$6 = {
   size = 162330480,
   vec_next = 0x9acf770,
   frame = 162338864,
   mini_p = 162338864,
   next = 983040,
   prev = 0,
   hchild = 0,
   vchild = 0,
   parent = 90,
   left_col = 11,
   top_line = 13,
   total_lines = 11,
   total_cols = 13,
   buffer = 13,
   start = 0,
   pointm = 97500210,
   force_start = 1,
   optional_new_start = 1,
   hscroll = -1,
   min_hscroll = -1,
   use_time = -1,
   sequence_number = -1,
   temslot = 27,
   last_modified = 27,
   last_overlay_modified = -1,
   last_point = -1,
   last_had_star = -1,
   vertical_scroll_bar = -1,
   left_margin_cols = 0,
   right_margin_cols = 0,
   left_fringe_width = 0,
   right_fringe_width = 0,
   fringes_outside_margins = 0,
   scroll_bar_width = 138412032,
   vertical_scroll_bar_type = 0,
   last_mark_x = 0,
   last_mark_y = 162338872,
   window_end_pos = 162338872,
---Type <return> to continue, or q <return> to quit---
   window_end_vpos = 162347256,
   window_end_valid = 162347256,
   update_mode_line = 983040,
   start_at_line_beg = 0,
   display_table = 0,
   dedicated = 13,
   base_line_number = 90,
   base_line_pos = 11,
   region_showing = 13,
   column_number_displayed = 11,
   redisplay_end_trigger = 13,
   too_small_ok = 13,
   orig_total_lines = 0,
   orig_top_line = 97565746,
   current_matrix = 0x1b,
   desired_matrix = 0x1b,
   nrows_scale_factor = -1,
   ncols_scale_factor = -1,
   last_cursor = {
     x = -1,
     y = -1,
     hpos = 153,
     vpos = 153
   },
   cursor = {
     x = -1,
     y = -1,
     hpos = -1,
     vpos = -1
   },
   phys_cursor = {
     x = 0,
     y = 0,
     hpos = 0,
     vpos = 0
   },
   phys_cursor_type = 0,
   phys_cursor_width = 138412032,
   phys_cursor_ascent = 0,
---Type <return> to continue, or q <return> to quit---
   phys_cursor_height = 0,
   overlay_arrow_bitmap = 162070328,
   phys_cursor_on_p = 0,
   cursor_off_p = 0,
   last_cursor_off_p = 0,
   must_be_updated_p = 1,
   pseudo_window_p = 1,
   vscroll = 162078712,
   window_end_bytepos = 162078712,
   frozen_window_start_p = 0,
   height_fixed_p = 0
}
(gdb)