Emacs abort

[Martin Fredriksson]

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)