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bug#43700: 28.0.50; Crash creating a second frame
From: |
Eli Zaretskii |
Subject: |
bug#43700: 28.0.50; Crash creating a second frame |
Date: |
Fri, 02 Oct 2020 14:49:36 +0300 |
> Cc: 43700@debbugs.gnu.org
> From: Andy Moreton <andrewjmoreton@gmail.com>
> Date: Fri, 2 Oct 2020 01:38:25 +0100
>
> On 01/10/2020 13:53, Eli Zaretskii wrote:
> > If you put a breakpoint in lookup_image, on the line indicated below:
> >
> > ptrdiff_t
> > lookup_image (struct frame *f, Lisp_Object spec, int face_id)
> > {
> > struct image *img;
> > EMACS_UINT hash;
> >
> > struct face *face = (face_id >= 0) ? FACE_FROM_ID (f, face_id)
> > : FACE_FROM_ID (f, DEFAULT_FACE_ID);
> > unsigned long foreground = FACE_COLOR_TO_PIXEL (face->foreground, f);
> > <<<<
> > unsigned long background = FACE_COLOR_TO_PIXEL (face->background, f);
> >
> > and condition the breakpoint by face == 0, does it break before the
> > crash when you perform the steps that reproduces the problem?
>
> Yes it does.
So the next question is: how come the default face is not available?
When that breakpoint breaks, what is the value of
FRAME_FACE_CACHE (f)->used
Is it zero, per chance? If so, I'd be interested to understand which
code resets the frame's face cache in this recipe.
> >> #11 0x00000004002c86e5 in lookup_image (f=0x5123410, spec=XIL(0xbc42793),
> >> face_id=0xffffffff) at C:/emacs/git/emacs/master/src/image.c:2334
> >
> > Why does face_id have the value 0xffffffff? The caller passes -1:
>
> This seems to be because I have "set output-radix 16" in ~/.gdbinit, so
> it displays the raw hex value. After "set output-radix 10" it displays
> the value as -1. Nothing untoward here.
Ah, okay. Nothing to worry about, then.
Thanks.
- bug#43700: 28.0.50; Crash creating a second frame, Eli Zaretskii, 2020/10/01
- bug#43700: 28.0.50; Crash creating a second frame, Andy Moreton, 2020/10/01
- bug#43700: 28.0.50; Crash creating a second frame,
Eli Zaretskii <=
- bug#43700: 28.0.50; Crash creating a second frame, Andy Moreton, 2020/10/02
- bug#43700: 28.0.50; Crash creating a second frame, Eli Zaretskii, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Andy Moreton, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Eli Zaretskii, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Andy Moreton, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Eli Zaretskii, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Andy Moreton, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Eli Zaretskii, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Andy Moreton, 2020/10/03
- bug#43700: 28.0.50; Crash creating a second frame, Eli Zaretskii, 2020/10/03