bug#17588: 24.3.91; mouse-face glitchy

[Christopher Schmidt <ch@ristopher.com>]

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Eli Zaretskii <eliz@gnu.org> writes:

Thanks a lot for your help.

> Can you see if clear_mouse_face is ever called from any other place,
> when the highlighting isn't cleared when you move the mouse pointer to
> another line of text in the same window?  If there _are_ any other
> places from which clear_mouse_face is called, could you please show
> the full contents of the hlinfo struct when it arrives in
> clear_mouse_face in those other call sequences?

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u(gdb) bt
#0  clear_mouse_face (hlinfo=hlinfo@entry=0x1394780)
    at xdisp.c:27495
#1  0x0000000000457fef in note_mouse_highlight (
    f=f@entry=0x1129898, x=494, y=378) at xdisp.c:28812
#2  0x00000000004b4b86 in note_mouse_movement (
    frame=frame@entry=0x1129898, 
    event=event@entry=0x7fffffffda70) at xterm.c:3887
#3  0x00000000004bcb09 in handle_one_xevent (
    dpyinfo=dpyinfo@entry=0x13946e0, 
    event=event@entry=0x7fffffffda70, 
    finish=finish@entry=0xb071e0, hold_quit=0x7fffffffdc90)
    at xterm.c:6644
#4  0x00000000004be320 in event_handler_gdk (
    gxev=0x7fffffffda70, ev=<optimized out>, 
    data=<optimized out>) at xterm.c:5720
#5  0x00007ffff65cca2a in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#6  0x00007ffff65ce6f6 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#7  0x00007ffff65ce77e in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#8  0x00007ffff4a89355 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007ffff4a89688 in ?? ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007ffff4a89744 in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007ffff69609a1 in gtk_main_iteration ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#12 0x00000000004b6d82 in XTread_socket (
    terminal=<optimized out>, hold_quit=0x7fffffffdc90)
    at xterm.c:7013
#13 0x00000000004e8be1 in gobble_input () at keyboard.c:6849
#14 0x00000000004e8605 in handle_async_input ()
    at keyboard.c:7089
#15 process_pending_signals () at keyboard.c:7103
#16 0x0000000000538bba in Fmake_list (length=<optimized out>, 
    init=12026738) at alloc.c:2637
#17 0x0000000000557b65 in concat (nargs=nargs@entry=1, 
    args=args@entry=0x7fffffffde08, target_type=Lisp_Cons, 
    last_special=last_special@entry=false) at fns.c:588
#18 0x0000000000558170 in Fcopy_sequence (arg=19393078)
    at fns.c:456
#19 0x00000000004e731f in timer_check () at keyboard.c:4567
#20 0x00000000004e7879 in readable_events (flags=1)
    at keyboard.c:3447
#21 0x00000000004e8cd8 in get_input_pending (
    flags=flags@entry=1) at keyboard.c:6764
#22 0x00000000004ebb9c in detect_input_pending_run_timers (
    do_display=do_display@entry=true) at keyboard.c:9892
#23 0x0000000000590c6f in wait_reading_process_output (
    time_limit=time_limit@entry=30, nsecs=nsecs@entry=0, 
    read_kbd=read_kbd@entry=-1, 
    do_display=do_display@entry=true, wait_for_cell=12026738, 
    wait_proc=wait_proc@entry=0x0, just_wait_proc=0)
    at process.c:4699
#24 0x000000000041f363 in sit_for (timeout=<optimized out>, 
    reading=reading@entry=true, 
    display_option=display_option@entry=1) at dispnew.c:5805
#25 0x00000000004eca63 in read_char (commandflag=1, 
    map=map@entry=19194998, prev_event=12026738, 
    used_mouse_menu=used_mouse_menu@entry=0x7fffffffe58b, 
    end_time=end_time@entry=0x0) at keyboard.c:2809
#26 0x00000000004edc75 in read_key_sequence (
    keybuf=keybuf@entry=0x7fffffffe660, prompt=12026738, 
    dont_downcase_last=dont_downcase_last@entry=false, 
    can_return_switch_frame=can_return_switch_frame@entry=true, 
    fix_current_buffer=fix_current_buffer@entry=true, 
    prevent_redisplay=prevent_redisplay@entry=false, bufsize=30)
    at keyboard.c:9087
#27 0x00000000004ef950 in command_loop_1 () at keyboard.c:1452
#28 0x0000000000550977 in internal_condition_case (
    bfun=bfun@entry=0x4ef760 <command_loop_1>, 
    handlers=<optimized out>, 
    hfun=hfun@entry=0x4e6bf0 <cmd_error>) at eval.c:1354
#29 0x00000000004e234e in command_loop_2 (
    ignore=ignore@entry=12026738) at keyboard.c:1177
#30 0x000000000055085b in internal_catch (tag=12073890, 
    func=func@entry=0x4e2330 <command_loop_2>, arg=12026738)
    at eval.c:1118
#31 0x00000000004e6807 in command_loop () at keyboard.c:1156
#32 recursive_edit_1 () at keyboard.c:777
#33 0x00000000004e6b20 in Frecursive_edit () at keyboard.c:848
#34 0x0000000000415ab9 in main (argc=0, argv=0x7fffffffe9a8)
    at emacs.c:1646
(gdb) p *hlinfo
$1 = {mouse_face_beg_row = -1, mouse_face_beg_col = -1, 
  mouse_face_beg_x = 0, mouse_face_end_row = -1, 
  mouse_face_end_col = -1, mouse_face_end_x = 0, 
  mouse_face_window = 12026738, mouse_face_face_id = 0, 
  mouse_face_overlay = 12026738, 
  mouse_face_mouse_frame = 0x1129898, mouse_face_mouse_x = 494, 
  mouse_face_mouse_y = 378, mouse_face_past_end = false, 
  mouse_face_defer = false, mouse_face_hidden = false}
(gdb) p NILP (hlinfo->mouse_face_window)
$2 = true

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(gdb) bt
#0  clear_mouse_face (hlinfo=hlinfo@entry=0x1394780)
    at xdisp.c:27495
#1  0x0000000000457fef in note_mouse_highlight (f=0x1129898, 
    x=62, y=468) at xdisp.c:28812
#2  0x00000000004b4af1 in XTframe_up_to_date (f=<optimized out>)
    at xterm.c:628
#3  0x000000000044c480 in redisplay_internal () at xdisp.c:13866
#4  0x000000000044e0d0 in redisplay_preserve_echo_area (
    from_where=from_where@entry=8) at xdisp.c:14058
#5  0x00000000004ebbb3 in detect_input_pending_run_timers (
    do_display=do_display@entry=true) at keyboard.c:9895
#6  0x0000000000590c6f in wait_reading_process_output (
    time_limit=time_limit@entry=30, nsecs=nsecs@entry=0, 
    read_kbd=read_kbd@entry=-1, 
    do_display=do_display@entry=true, wait_for_cell=12026738, 
    wait_proc=wait_proc@entry=0x0, just_wait_proc=0)
    at process.c:4699
#7  0x000000000041f363 in sit_for (timeout=<optimized out>, 
    reading=reading@entry=true, 
    display_option=display_option@entry=1) at dispnew.c:5805
#8  0x00000000004eca63 in read_char (commandflag=1, 
    map=map@entry=19194998, prev_event=12026738, 
    used_mouse_menu=used_mouse_menu@entry=0x7fffffffe58b, 
    end_time=end_time@entry=0x0) at keyboard.c:2809
#9  0x00000000004edc75 in read_key_sequence (
    keybuf=keybuf@entry=0x7fffffffe660, prompt=12026738, 
    dont_downcase_last=dont_downcase_last@entry=false, 
    can_return_switch_frame=can_return_switch_frame@entry=true, 
    fix_current_buffer=fix_current_buffer@entry=true, 
    prevent_redisplay=prevent_redisplay@entry=false, bufsize=30)
    at keyboard.c:9087
#10 0x00000000004ef950 in command_loop_1 () at keyboard.c:1452
#11 0x0000000000550977 in internal_condition_case (
    bfun=bfun@entry=0x4ef760 <command_loop_1>, 
    handlers=<optimized out>, 
    hfun=hfun@entry=0x4e6bf0 <cmd_error>) at eval.c:1354
#12 0x00000000004e234e in command_loop_2 (
    ignore=ignore@entry=12026738) at keyboard.c:1177
#13 0x000000000055085b in internal_catch (tag=12073890, 
    func=func@entry=0x4e2330 <command_loop_2>, arg=12026738)
    at eval.c:1118
#14 0x00000000004e6807 in command_loop () at keyboard.c:1156
#15 recursive_edit_1 () at keyboard.c:777
#16 0x00000000004e6b20 in Frecursive_edit () at keyboard.c:848
#17 0x0000000000415ab9 in main (argc=0, argv=0x7fffffffe9a8)
    at emacs.c:1646
(gdb) p *hlinfo
$3 = {mouse_face_beg_row = -1, mouse_face_beg_col = -1, 
  mouse_face_beg_x = 0, mouse_face_end_row = -1, 
  mouse_face_end_col = -1, mouse_face_end_x = 0, 
  mouse_face_window = 12026738, mouse_face_face_id = 0, 
  mouse_face_overlay = 12026738, 
  mouse_face_mouse_frame = 0x1129898, mouse_face_mouse_x = 62, 
  mouse_face_mouse_y = 468, mouse_face_past_end = false, 
  mouse_face_defer = false, mouse_face_hidden = false}
(gdb) p NILP( hlinfo->mouse_face_window)
$4 = true