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bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux
From: |
Eli Zaretskii |
Subject: |
bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux |
Date: |
Sat, 01 Feb 2020 10:46:45 +0200 |
> From: Frank Terbeck <ft@bewatermyfriend.org>
> Cc: 37671@debbugs.gnu.org
> Date: Sat, 01 Feb 2020 03:43:13 +0100
>
> (gdb) p w->current_matrix
> $12 = (struct glyph_matrix *) 0x7a
>
> (gdb) p draw
> $13 = DRAW_NORMAL_TEXT
>
> (gdb) p hlinfo->mouse_face_hidden
> $14 = false
>
> (gdb) p hlinfo->mouse_face_end_row
> $15 = 16
>
> (gdb) p w->current_matrix->nrows
> Cannot access memory at address 0x92
>
> (gdb) p w->current_matrix
> $17 = (struct glyph_matrix *) 0x7a
This window is dead, AFAICT, and its memory has been recycled. So
somehow we attempt to show mouse highlight on a deleted window or
something. I have no idea how this could have happened.
Moreover, the frame itself seems to have bogus values:
> (gdb) p *f
> $10 = {header = {size = 285941742698496},
> name = 0x55573dc812400000,
> icon_name = 0xfffffffffe000055,
> title = 0xfffffffffeffffff,
> parent_frame = 0xfffffffffeffffff,
> focus_frame = 0xfffffffffeffffff,
> root_window = 0xfffffffffeffffff,
> selected_window = 0xfffffffffeffffff,
> old_selected_window = 0xfffffffffeffffff,
> minibuffer_window = 0xfffffffffeffffff,
> param_alist = 0xfffffffffeffffff,
> scroll_bars = 0xfffffffffeffffff,
> condemned_scroll_bars = 0xfffffffffeffffff,
> menu_bar_items = 0xfffffffffeffffff,
> face_alist = 0xfffffffffeffffff,
> menu_bar_vector = 0xfffffffffeffffff,
> buffer_predicate = 0xfffffffffeffffff,
> buffer_list = 0xfffffffffeffffff,
> buried_buffer_list = 0xfffffffffeffffff,
> tab_bar_window = 0xfffffffffeffffff,
> desired_tab_bar_string = 0xfffffffffeffffff,
> current_tab_bar_string = 0xfffffffffeffffff,
> tool_bar_window = 0xfffffffffeffffff,
> desired_tool_bar_string = 0xfffffffffeffffff,
> current_tool_bar_string = 0xfffffffffeffffff,
> font_data = 0xfffffffffeffffff,
> tab_bar_items = 0xfffffffffeffffff,
> tool_bar_items = 0xfffffffffeffffff,
> face_cache = 0xfffffffffeffffff,
> last_tab_bar_item = -16777217,
> last_tool_bar_item = -1,
> menu_bar_items_used = -16777217,
> namebuf = 0xfffffffffeffffff <error: Cannot access memory at address
> 0xfffffffffeffffff>,
> shell_position = 0xfffffffffeffffff <error: Cannot access memory at
> address 0xfffffffffeffffff>,
What exactly did you do immediately prior to the crash?
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Eli Zaretskii, 2020/02/01
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux,
Eli Zaretskii <=
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Frank Terbeck, 2020/02/01
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Eli Zaretskii, 2020/02/01
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Frank Terbeck, 2020/02/01
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Eli Zaretskii, 2020/02/01
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Frank Terbeck, 2020/02/01
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Eli Zaretskii, 2020/02/15
- bug#37671: 27.0.50; Segmentation fault with --fg-daemon on Linux, Frank Terbeck, 2020/02/15