bug#48337: Fwd: 28.0.50; Emacs crashing randomly (possibly minibuffer activity related)

["Alex Bennée" <alex.bennee@linaro.org>]

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(gdb) pp Vminibuffer_list
(#<buffer  *Minibuf-0*> #<buffer  *Minibuf-1*>)

On Tue, 11 May 2021 at 13:21, Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Alex Bennée <alex.bennee@linaro.org>
> > Date: Tue, 11 May 2021 07:51:20 +0100
> > Cc: 48337@debbugs.gnu.org, Alan Mackenzie <acm@muc.de>
> >
> > I can now recreate at will with a magit sequence (l o hackbox/ TAB)
> which triggers a minibuffer re-size to
> > accommodate the list of git branches:
> >
> > (gdb) info frame 0
> > Stack frame at 0x7fffffffb2e0:
> >  rip = 0x5555556a80ef in Factive_minibuffer_window (minibuf.c:230);
> saved rip = 0x5555556f52ab
> >  called by frame at 0x7fffffffb340
> >  source language c.
> >  Arglist at 0x7fffffffb2c8, args:
> >  Locals at 0x7fffffffb2c8, Previous frame's sp is 0x7fffffffb2e0
> >  Saved registers:
> >   rip at 0x7fffffffb2d8
> > (gdb) x/5i $pc
> > => 0x5555556a80ef <Factive_minibuffer_window+79>:       mov
> -0x3(%rax),%r10
> >    0x5555556a80f3 <Factive_minibuffer_window+83>:       lea
> -0x3(%rdx),%eax
> >    0x5555556a80f6 <Factive_minibuffer_window+86>:       test   $0x7,%al
> >    0x5555556a80f8 <Factive_minibuffer_window+88>:       jne
> 0x5555556a8153
> > <Factive_minibuffer_window+179>
> >    0x5555556a80fa <Factive_minibuffer_window+90>:       nopw
>  0x0(%rax,%rax,1)
> > (gdb) p/x $rax
> > $4 = 0x0
> > (gdb) p/x $r10
> > $5 = 0x7fffeece9c6d
> > (gdb) l
> > 225       Lisp_Object innermost_MB;
> > 226
> > 227       if (!minibuf_level)
> > 228         return Qnil;
> > 229
> > 230       innermost_MB = nth_minibuffer (minibuf_level);
> > 231       FOR_EACH_FRAME (frames, frame)
> > 232         {
> > 233           f = XFRAME (frame);
> > 234           if (FRAME_LIVE_P (f)
> > (gdb) p minibuf_level
> > $6 = 2
> > (gdb) p Vminibuffer_list
> > $7 = (Lisp_Object) 0x555555c9aca3
> > (gdb) p $*
> > A syntax error in expression, near `'.
> > (gdb) p *$
> > $8 = <incomplete type>
> > (gdb)
> >
> > Let me know if you want something else.
>
> I want this:
>
>   (gdb) pp Vminibuffer_list
>
> If GDB says it doesn't know "pp", you need to source the .gdbinit file
> in the Emacs's src directory.
>
> Thanks.
>


-- 
Alex Bennée
KVM/QEMU Hacker for Linaro

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