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Subject: |
etc/DEBUG could say more about --enable-check-lisp-object-type |
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Date: |
Thu, 06 Jan 2022 11:20:19 -0700 |
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User-agent: |
Notmuch/0.31.4 (https://notmuchmail.org) Emacs/29.0.50 (x86_64-pc-linux-gnu) |
Hello,
On Wed 05 Jan 2022 at 02:11PM +02, Eli Zaretskii wrote:
> Comparisons with structures, like foo == Qnil, aren't guaranteed to
> work in GDB. --enable-check-lisp-object-type makes Lisp objects be
> structures rather than simple scalar values.
Thanks -- how about the attached?
--
Sean Whitton
0001-etc-DEBUG-Say-more-about-enable-check-lisp-object-ty.patch
Description: Text Data
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Subject: |
Re: bug#53058: etc/DEBUG could say more about --enable-check-lisp-object-type |
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Date: |
Thu, 03 Feb 2022 09:28:49 +0200 |
> From: Sean Whitton <spwhitton@spwhitton.name>
> Cc: 53058@debbugs.gnu.org
> Date: Wed, 02 Feb 2022 17:19:04 -0700
>
> Hello,
>
> On Sat 08 Jan 2022 at 08:55am +02, Eli Zaretskii wrote:
>
> > The reasons for the problem in your case is not known: NILP should
> > have worked, as did the comparison with Qnil. Until we understand why
> > those didn't work, I don't see how we can say anything in etc/DEBUG
> > that would both be useful and important/general enough to have there.
> >
> > My best advice is to try to understand why those conditions didn't
> > work on your system. Maybe someone here knowns, or maybe you should
> > ask on the GDB mailing list (gdb@sourceware.org).
>
> If I understand you correctly: we don't yet know exactly what was going
> wrong on my machine when I tried to set the conditional break point, so
> we lack a concrete case in which --enable-check-lisp-object-type
> affected debugging with GDB, and we are thus not in a position to assert
> in etc/DEBUG that --enable-check-lisp-object-type has the potential to
> have an effect on debugging with gdb?
Yes.
> When you wrote that comparisons with structs are not guaranteed to work
> with gdb, you were /not/ going as far as saying that comparisons with
> structs are never expected to work (because that would imply that
> --enable-check-lisp-object-type would often lead to issues when
> debugging)?
Yes.
> If this summary is right, I think this bug should be closed.
OK, closing.
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