GNU bug report logs - #61703
29.0.60; Emacs crashes on C-x 8 RET

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

From: Kai Ma <justksqsf <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.60; Emacs crashes on C-x 8 RET
Date: Wed, 22 Feb 2023 16:00:29 +0800

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

Emacs sometimes crashes on C-x 8 RET, ie. (insert-char).

Sorry, but I didn't find a way to reproduce this issue with emacs -Q.

This seems to be related to vertico-posframe-mode (which puts the
minibuffer in a separate child frame).  I can confirm that if I disable
vertico-posframe-mode, this problem disappears.

Attached are the system-generated crash report and a backtrace obtained
from LLDB.

[crash_report.txt (text/plain, attachment)]

[backtrace.txt (text/plain, attachment)]

[Message part 4 (text/plain, inline)]

In GNU Emacs 29.0.60 (build 4, x86_64-apple-darwin22.3.0, NS
 appkit-2299.40 Version 13.2.1 (Build 22D68)) of 2023-02-22 built on
 Kais-MacBook.local
Repository revision: fb5dbf6de73fa034338448f1029c55f85d1078b4
Repository branch: HEAD
Windowing system distributor 'Apple', version 10.3.2299
System Description:  macOS 13.2.1

Configured using:
 'configure --with-ns --with-xwidgets'

Configured features:
ACL DBUS GIF GLIB GMP GNUTLS JPEG JSON LCMS2 LIBXML2 MODULES NOTIFY
KQUEUE NS PDUMPER PNG RSVG SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS
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Important settings:
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  value of $LANG: zh_CN.utf-8
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Major mode: Lisp Interaction

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/Users/kaima/.emacs.d/elpa/transient-20230214.1525/transient hides /Users/kaima/src/emacs/lisp/transient

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Message #8 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Kai Ma <justksqsf <at> gmail.com>
Cc: 61703 <at> debbugs.gnu.org
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Wed, 22 Feb 2023 14:40:31 +0200

> From: Kai Ma <justksqsf <at> gmail.com>
> Date: Wed, 22 Feb 2023 16:00:29 +0800
> 
> Emacs sometimes crashes on C-x 8 RET, ie. (insert-char).
> 
> Sorry, but I didn't find a way to reproduce this issue with emacs -Q.
> 
> This seems to be related to vertico-posframe-mode (which puts the
> minibuffer in a separate child frame).  I can confirm that if I disable
> vertico-posframe-mode, this problem disappears.

Please provide at least the information you can provide: what did you
type at the "C-x 8 RET" prompt, and when exactly it crashed during
this command.  Also, how to setup vertico-posframe-mode like you do.

Basically, these problems are impossible to debug without a
reproducible recipe, so any details count.

Thanks in advance.

Message #11 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Kai Ma <justksqsf <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 61703 <at> debbugs.gnu.org
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Wed, 22 Feb 2023 20:59:54 +0800

> On Feb 22, 2023, at 20:40, Eli Zaretskii <eliz <at> gnu.org> wrote:
> 
>> From: Kai Ma <justksqsf <at> gmail.com>
>> Date: Wed, 22 Feb 2023 16:00:29 +0800
>> 
>> Emacs sometimes crashes on C-x 8 RET, ie. (insert-char).
>> 
>> Sorry, but I didn't find a way to reproduce this issue with emacs -Q.
>> 
>> This seems to be related to vertico-posframe-mode (which puts the
>> minibuffer in a separate child frame).  I can confirm that if I disable
>> vertico-posframe-mode, this problem disappears.
> 
> Please provide at least the information you can provide: what did you
> type at the "C-x 8 RET" prompt, and when exactly it crashed during
> this command.  Also, how to setup vertico-posframe-mode like you do.

This is how I reproduce this crash:

1. Create a fresh Emacs instance.

2. Press C-x 8 RET before doing anything else.
   If vertico-posframe is displayed successfully at least once (e.g. using M-x)
   then Emacs won’t crash from insert-char anymore.

3. Emacs crashes before the child frame appears, so I don’t have a 
   chance to type anything.


There is a minimal init.el with which I can reproduce this crash:

  (package-install 'vertico)
  (package-install 'vertico-posframe)

  (use-package vertico
    :hook (after-init . vertico-mode))

  (use-package vertico-posframe
    :hook (vertico-mode . vertico-posframe-mode))



> Basically, these problems are impossible to debug without a
> reproducible recipe, so any details count.
> 
> Thanks in advance.

Message #14 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Kai Ma <justksqsf <at> gmail.com>
Cc: 61703 <at> debbugs.gnu.org
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Wed, 22 Feb 2023 16:08:02 +0200

> From: Kai Ma <justksqsf <at> gmail.com>
> Date: Wed, 22 Feb 2023 20:59:54 +0800
> Cc: 61703 <at> debbugs.gnu.org
> 
> 1. Create a fresh Emacs instance.
> 
> 2. Press C-x 8 RET before doing anything else.
>    If vertico-posframe is displayed successfully at least once (e.g. using M-x)
>    then Emacs won’t crash from insert-char anymore.
> 
> 3. Emacs crashes before the child frame appears, so I don’t have a 
>    chance to type anything.
> 
> 
> There is a minimal init.el with which I can reproduce this crash:
> 
>   (package-install 'vertico)
>   (package-install 'vertico-posframe)
> 
>   (use-package vertico
>     :hook (after-init . vertico-mode))
> 
>   (use-package vertico-posframe
>     :hook (vertico-mode . vertico-posframe-mode))

Thanks.  Unfortunately, it doesn't crash for me, after doing these
steps.

Any other steps I could try to increase the probability of a crash?

Does this happen with any font you use as the default font?

Message #17 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Kai Ma <justksqsf <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 61703 <at> debbugs.gnu.org
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Thu, 23 Feb 2023 02:45:58 +0800

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

> On Feb 22, 2023, at 22:08, Eli Zaretskii <eliz <at> gnu.org> wrote:
> 
>> From: Kai Ma <justksqsf <at> gmail.com>
>> Date: Wed, 22 Feb 2023 20:59:54 +0800
>> Cc: 61703 <at> debbugs.gnu.org
>> 
>> 1. Create a fresh Emacs instance.
>> 
>> 2. Press C-x 8 RET before doing anything else.
>>   If vertico-posframe is displayed successfully at least once (e.g. using M-x)
>>   then Emacs won’t crash from insert-char anymore.
>> 
>> 3. Emacs crashes before the child frame appears, so I don’t have a 
>>   chance to type anything.
>> 
>> 
>> There is a minimal init.el with which I can reproduce this crash:
>> 
>>  (package-install 'vertico)
>>  (package-install 'vertico-posframe)
>> 
>>  (use-package vertico
>>    :hook (after-init . vertico-mode))
>> 
>>  (use-package vertico-posframe
>>    :hook (vertico-mode . vertico-posframe-mode))
> 
> Thanks.  Unfortunately, it doesn't crash for me, after doing these
> steps.
> 
> Any other steps I could try to increase the probability of a crash?

I tried to make a self-contained tarball.

[repro.tgz (application/octet-stream, attachment)]

[Message part 3 (text/plain, inline)]

emacs -Q -l bug.el, and then C-x 8 RET.

> Does this happen with any font you use as the default font?


I tested against some fonts with

    emacs -Q --eval "(set-face-attribute 'default nil :family FONT)" -l bug.el

Indeed the choice of the default font seems relevant. The observed results:

| Menlo (default monospace font) | crash    |
| Courier New                    | crash    |
| Courier Prime                  | no crash |
| JetBrains Mono                 | no crash |
| Cascadia Mono                  | crash    |
| Fira Code                      | no crash |
| Fira Mono                      | crash    |

Hope this helps.

Message #20 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Kai Ma <justksqsf <at> gmail.com>
Cc: 61703 <at> debbugs.gnu.org
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Wed, 22 Feb 2023 22:18:29 +0200

> From: Kai Ma <justksqsf <at> gmail.com>
> Date: Thu, 23 Feb 2023 02:45:58 +0800
> Cc: 61703 <at> debbugs.gnu.org
> 
> > Thanks.  Unfortunately, it doesn't crash for me, after doing these
> > steps.
> > 
> > Any other steps I could try to increase the probability of a crash?
> 
> I tried to make a self-contained tarball.

Thanks, but this still doesn't crash for me.

My build is unoptimized (-O0).  Do you see the crash if you rebuild
with -O0?

> I tested against some fonts with
> 
>     emacs -Q --eval "(set-face-attribute 'default nil :family FONT)" -l bug.el
> 
> Indeed the choice of the default font seems relevant. The observed results:
> 
> | Menlo (default monospace font) | crash    |
> | Courier New                    | crash    |
> | Courier Prime                  | no crash |
> | JetBrains Mono                 | no crash |
> | Cascadia Mono                  | crash    |
> | Fira Code                      | no crash |
> | Fira Mono                      | crash    |

I'm on MS-Windows, where Courier New is the default font, and it still
doesn't crash...

Message #23 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Kai Ma <justksqsf <at> gmail.com>, 61703 <at> debbugs.gnu.org
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Wed, 22 Feb 2023 21:29:55 +0000

>> Indeed the choice of the default font seems relevant. The observed 
>> results:
>>
>> | Menlo (default monospace font) | crash    |
>> | Courier New                    | crash    |
>> | Courier Prime                  | no crash |
>> | JetBrains Mono                 | no crash |
>> | Cascadia Mono                  | crash    |
>> | Fira Code                      | no crash |
>> | Fira Mono                      | crash    |
>
> I'm on MS-Windows, where Courier New is the default font, and it still 
> doesn't crash...
>

FWIW, I tried that recipe here (Debian GNU/Linux) with Fira Mono, Menlo 
and Cascadia Mono, without experiencing any crash.  Perhaps it's a macOS 
specific bug.

Message #26 received at 61703 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Gregory Heytings <gregory <at> heytings.org>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 61703 <at> debbugs.gnu.org,
 Kai Ma <justksqsf <at> gmail.com>
Subject: Re: bug#61703: 29.0.60; Emacs crashes on C-x 8 RET
Date: Tue, 5 Sep 2023 16:44:04 -0700

tags 61703 + unreproducible
thanks

Gregory Heytings <gregory <at> heytings.org> writes:

>>> Indeed the choice of the default font seems relevant. The observed results:
>>>
>>> | Menlo (default monospace font) | crash    |
>>> | Courier New                    | crash    |
>>> | Courier Prime                  | no crash |
>>> | JetBrains Mono                 | no crash |
>>> | Cascadia Mono                  | crash    |
>>> | Fira Code                      | no crash |
>>> | Fira Mono                      | crash    |
>>
>> I'm on MS-Windows, where Courier New is the default font, and it still doesn't
>> crash...
>>
>
> FWIW, I tried that recipe here (Debian GNU/Linux) with Fira Mono, Menlo and
> Cascadia Mono, without experiencing any crash.  Perhaps it's a macOS specific
> bug.

I can't reproduce this here.  I do get the following error when running
the reproducer though:

eval: Symbol’s value as variable is void: FONT

In GNU Emacs 30.0.50 (build 5, x86_64-apple-darwin21.6.0, NS
 appkit-2113.60 Version 12.6.8 (Build 21G725)) of 2023-09-04 built on
 MY-MacBook-Pro

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