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bug#61704: 29.0.60; Crash in get_narrowed_begv
From: |
Eli Zaretskii |
Subject: |
bug#61704: 29.0.60; Crash in get_narrowed_begv |
Date: |
Wed, 22 Feb 2023 15:44:23 +0200 |
> Date: Wed, 22 Feb 2023 13:17:27 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: luangruo@yahoo.com, 61704@debbugs.gnu.org
>
>
> >> How can len possibly be 0 at that point? It is (in short)
> >> window_body_width (w, WINDOW_BODY_IN_CANONICAL_CHARS) *
> >> window_body_height (w, WINDOW_BODY_IN_CANONICAL_CHARS). We could add a
> >> condition in get_narrowed_len to return 1 when the result is 0, but it
> >> could be a bug somewhere else (can a window body have a zero width
> >> and/or height?), in which case it would be better to fix the bug there.
> >
> > I agree that we should understand how this happened (and asked a similar
> > question), but I installed a defensive protection anyway. It cannot do
> > any harm.
> >
>
> Okay. Let's hope this will not hide another real bug.
>
> I found a way to get such small windows: set window-min-width,
> window-min-height, window-safe-min-width and window-safe-min-heigth to 0.
> Of course doing that ignores the fact that the docstring of the
> window-safe-min-* variables say that "Anything less might crash Emacs",
> and that their values are 2 (width) and 1 (height). Which makes me wonder
> why these variables can be changed / exist.
Maybe Martin (CC'ed) can answer that.
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Po Lu, 2023/02/22
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Gregory Heytings, 2023/02/22
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Eli Zaretskii, 2023/02/22
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Gregory Heytings, 2023/02/22
- bug#61704: 29.0.60; Crash in get_narrowed_begv,
Eli Zaretskii <=
- bug#61704: 29.0.60; Crash in get_narrowed_begv, martin rudalics, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Po Lu, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, martin rudalics, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Po Lu, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, martin rudalics, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Eli Zaretskii, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Po Lu, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Gregory Heytings, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Po Lu, 2023/02/23
- bug#61704: 29.0.60; Crash in get_narrowed_begv, Gregory Heytings, 2023/02/23