GNU bug report logs - #62895
Emacs 28.2 NS build segfaults on startup

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "F. Romage" <mrfromage <at> comcast.net>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: Emacs 28.2 NS build segfaults on startup
Date: Sun, 16 Apr 2023 17:54:08 -0400 (EDT)

[Message part 1 (text/plain, inline)]

Building Emacs 28.2 with the --with-ns option succeeds under Fedora 37 using GNUstep, but running it results in an immediate segmentation fault. I have attached the console messages before the segfault, as well as the strace output.

With Emacs 27.2 the build runs and works for the most part, provided I use the cairo backend for GNUstep (defaults write NSGlobalDomain GSBackend libgnustep-cairo). With the default art backend or the xlib backend (libgnustep-art, libgnustep-xlib) the text in the editor is garbled and fairly unreadable. The cairo backend fixes all that, but it would be nice to use the default art backend, since many GNUstep apps work better with that.

[Message part 2 (text/html, inline)]

[emacs-strace.txt (text/plain, attachment)]

[emacs-segfault.txt (text/plain, attachment)]

Message #8 received at 62895 <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: "F. Romage" <mrfromage <at> comcast.net>
Cc: 62895 <at> debbugs.gnu.org
Subject: Re: bug#62895: Emacs 28.2 NS build segfaults on startup
Date: Wed, 19 Apr 2023 10:38:53 +0800

"F. Romage" <mrfromage <at> comcast.net> writes:

> Building Emacs 28.2 with the --with-ns option succeeds under Fedora 37 using GNUstep, but running it results in an immediate segmentation
> fault. I have attached the console messages before the segfault, as well as the strace output. 
>
> With Emacs 27.2 the build runs and works for the most part, provided I use the cairo backend for GNUstep (defaults write NSGlobalDomain
> GSBackend libgnustep-cairo). With the default art backend or the xlib backend (libgnustep-art, libgnustep-xlib) the text in the editor is garbled
> and fairly unreadable. The cairo backend fixes all that, but it would be nice to use the default art backend, since many GNUstep apps work
> better with that. 

The GNUstep build works in Emacs 29.  Large parts of its font driver
have also been rewritten, so text display problems should no longer be
present.

Message #11 received at 62895 <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: "F. Romage" <mrfromage <at> comcast.net>
Cc: 62895 <at> debbugs.gnu.org
Subject: Re: bug#62895: Emacs 28.2 NS build segfaults on startup
Date: Thu, 20 Apr 2023 11:13:08 +0800

"F. Romage" <mrfromage <at> comcast.net> writes:

>> On 04/18/2023 10:38 PM Po Lu <luangruo <at> yahoo.com> wrote:
>> The GNUstep build works in Emacs 29.  Large parts of its font driver
>> have also been rewritten, so text display problems should no longer be present.
>
> Today I checked out the latest code using git, which gave me this version information:
>
> GNU Emacs 30.0.50
> Development version a01528c95002 on master branch; build date 2023-04-19.
>
> I was able to build using --with-ns but got the same segfault when running it as I did with 28.2. Was there a regression from Emacs 29 to 30 for the NS build?

Then would you please show a backtrace from the crash, and also tell
which version of GNUstep you have installed?  It works for me.

Message #14 received at 62895 <at> debbugs.gnu.org (full text, mbox):

From: "F. Romage" <mrfromage <at> comcast.net>
To: Po Lu <luangruo <at> yahoo.com>
Cc: 62895 <at> debbugs.gnu.org
Subject: Re: bug#62895: Emacs 28.2 NS build segfaults on startup
Date: Wed, 19 Apr 2023 22:18:40 -0400 (EDT)

> On 04/18/2023 10:38 PM Po Lu <luangruo <at> yahoo.com> wrote:
> The GNUstep build works in Emacs 29.  Large parts of its font driver
> have also been rewritten, so text display problems should no longer be present.

Today I checked out the latest code using git, which gave me this version information:

GNU Emacs 30.0.50
Development version a01528c95002 on master branch; build date 2023-04-19.

I was able to build using --with-ns but got the same segfault when running it as I did with 28.2. Was there a regression from Emacs 29 to 30 for the NS build?

Message #17 received at 62895 <at> debbugs.gnu.org (full text, mbox):

From: "F. Romage" <mrfromage <at> comcast.net>
To: Po Lu <luangruo <at> yahoo.com>
Cc: 62895 <at> debbugs.gnu.org
Subject: Re: bug#62895: Emacs 28.2 NS build segfaults on startup
Date: Sun, 23 Apr 2023 14:52:17 -0400 (EDT)

> On 04/19/2023 11:13 PM Po Lu <luangruo <at> yahoo.com> wrote:
> Then would you please show a backtrace from the crash, and also tell
> which version of GNUstep you have installed?  It works for me.

I was using GNUstep base 1.24 and gui 0.24. Upgrading to base 1.28 and gui 0.29 fixed the problem with Emacs 30.0.50 not starting. In fact it's more stable than Emacs 27.2 with the older GNUstep I had been using. I'm still trying to get themes working properly, but everything else seems to work fine. Thanks for providing a reason for upgrading GNUstep, which I had been putting off for several years. I think this bug report can be closed.

Message #22 received at 62895-done <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: "F. Romage" <mrfromage <at> comcast.net>
Cc: 62895-done <at> debbugs.gnu.org
Subject: Re: bug#62895: Emacs 28.2 NS build segfaults on startup
Date: Mon, 24 Apr 2023 08:47:35 +0800

"F. Romage" <mrfromage <at> comcast.net> writes:

>> On 04/19/2023 11:13 PM Po Lu <luangruo <at> yahoo.com> wrote:
>> Then would you please show a backtrace from the crash, and also tell
>> which version of GNUstep you have installed?  It works for me.
>
> I was using GNUstep base 1.24 and gui 0.24. Upgrading to base 1.28 and
> gui 0.29 fixed the problem with Emacs 30.0.50 not starting. In fact
> it's more stable than Emacs 27.2 with the older GNUstep I had been
> using. I'm still trying to get themes working properly, but everything
> else seems to work fine. Thanks for providing a reason for upgrading
> GNUstep, which I had been putting off for several years. I think this
> bug report can be closed.

OK, closing.  Thanks.

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