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bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains
From: |
Eli Zaretskii |
Subject: |
bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains |
Date: |
Thu, 08 Jul 2021 19:47:10 +0300 |
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: michael.albinus@gmx.de, ncaprisunfan@gmail.com, 49261@debbugs.gnu.org
> Date: Thu, 08 Jul 2021 15:34:54 +0200
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > Which means unfortunately that to see the form one needs to display
> > the form piecemeal, one member at a time, using the xtype and the
> > other x* commands... Let me know if you need more detailed
> > instructions.
>
> Yes, that'd be appreciated.
Well, you did it (almost) correctly:
> (gdb) xtype form
> Lisp_Cons
> (gdb) xcons form
> $2 = (struct Lisp_Cons *) 0x7ffff211c260
> {
> u = {
> s = {
> car = XIL(0x2aaa9c41a9e0),
> u = {
> cdr = XIL(0),
> chain = 0x0
> }
> },
> gcaligned = 0xe0
> }
> }
> (gdb) xcar form
> $3 = 0x0
> (gdb) xcdr form
> $4 = 0x0
What you need to do is this:
(gdb) xtype
Lisp_Cons
(gdb) xcons
$2 = (struct Lisp_Cons *) 0x7ffff211c260
{
u = {
s = {
car = XIL(0x2aaa9c41a9e0),
u = {
cdr = XIL(0),
chain = 0x0
}
},
gcaligned = 0xe0
}
}
(gdb) p $2->u.s.car
(gdb) xtype
And after the second "xtype" continue with the x* command according to
the type.
Your mistake was to use an argument after xcons, xcar, and xcdr: these
should be invoked without an argument, immediately after printing a
Lisp_Object variable. Like this:
(gdb) p form
(gdb) xcar
(gdb) p form
(gdb) xcdr
etc.
> Which doesn't seem ... right?
No, but the real form has a non-nil 'car', see above. So that does
look valid, at least at this level. The invalid part probably comes
when you recurse deeper into 'form'.
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, (continued)
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/08
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains,
Eli Zaretskii <=
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/10
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/10
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/10
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/10
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Eli Zaretskii, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07
- bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains, Lars Ingebrigtsen, 2021/07/07