GNU bug report logs - #57792
29.0.50; async-shell-command fails with prefix-argument on -master

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

From: Vladimir Nikishkin <lockywolf <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.50; async-shell-command fails with prefix-argument on -master
Date: Wed, 14 Sep 2022 11:55:21 +0800

Dear Emacs developers,

I have recently compiled Emacs from -master
(5abcc2fc679cc256b4fe5fe300cc67fd205aaf26),
and found the following issue:

In the *scratch* buffer:
C-u M-& echo test RET
results in an error, whereas on stable Emacs it pastes "test\n" at
point.

The error is:
(wrong-type-argument stringp (4))
The stack trace is:
Debugger entered--Lisp error: (wrong-type-argument stringp (4))
  shell-command("echo test &" (4) nil)
  async-shell-command("echo test" (4) nil)
  funcall-interactively(async-shell-command "echo test" (4) nil)
  command-execute(async-shell-command)

Hope this helps.


In GNU Emacs 29.0.50 (build 1, x86_64-slackware-linux-gnu, GTK+ Version
 3.24.31, cairo version 1.16.0) of 2022-09-13 built on
 laptop.lockywolf.net
System Description: Slackware 15.0 x86_64

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-- 
Your sincerely,
Vladimir Nikishkin (MiEr, lockywolf)
(Laptop)

Message #8 received at 57792 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Vladimir Nikishkin <lockywolf <at> gmail.com>
Cc: 57792 <at> debbugs.gnu.org
Subject: Re: bug#57792: 29.0.50; async-shell-command fails with
 prefix-argument on -master
Date: Wed, 14 Sep 2022 00:51:54 -0700

found 57792 27.1
found 57792 28.2
tags 57792 + confirmed
thanks

Vladimir Nikishkin <lockywolf <at> gmail.com> writes:

> In the *scratch* buffer:
> C-u M-& echo test RET
> results in an error, whereas on stable Emacs it pastes "test\n" at
> point.
>
> The error is:
> (wrong-type-argument stringp (4))
> The stack trace is:
> Debugger entered--Lisp error: (wrong-type-argument stringp (4))
>   shell-command("echo test &" (4) nil)
>   async-shell-command("echo test" (4) nil)
>   funcall-interactively(async-shell-command "echo test" (4) nil)
>   command-execute(async-shell-command)

This is from `get-buffer-create' in simple.el:4572.

> Hope this helps.

I can reproduce this bug on master, 27.1 and 28.2.  Here's a test case
(not tested):

(ert-deftest simple-tests-async-shell-command-57792 ()
  "Test for https://debbugs.gnu.org/57792 ."
  (with-temp-buffer
    ;; Pretend we have a prefix argument.
    (async-shell-command "echo \"test\"" '(4))
    (should (equal (buffer-string) "test"))))

I'm not sure what behavior we want here, though.  Should we insert the
command output directly at point in the current buffer, or should we
first insert it into "*Async Shell Command*" and copy it over when done?

Message #17 received at 57792 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: 57792 <at> debbugs.gnu.org, Vladimir Nikishkin <lockywolf <at> gmail.com>
Subject: Re: bug#57792: 29.0.50; async-shell-command fails with
 prefix-argument on -master
Date: Wed, 14 Sep 2022 16:13:41 +0200

Stefan Kangas <stefankangas <at> gmail.com> writes:

> I can reproduce this bug on master, 27.1 and 28.2.  Here's a test case
> (not tested):
>
> (ert-deftest simple-tests-async-shell-command-57792 ()
>   "Test for https://debbugs.gnu.org/57792 ."
>   (with-temp-buffer
>     ;; Pretend we have a prefix argument.
>     (async-shell-command "echo \"test\"" '(4))
>     (should (equal (buffer-string) "test"))))
>
> I'm not sure what behavior we want here, though.  Should we insert the
> command output directly at point in the current buffer, or should we
> first insert it into "*Async Shell Command*" and copy it over when done?

The prefix isn't documented to do anything (and currently bugs out), so
perhaps we should just remove the prefix from the interactive spec
instead?

Is the intention that `C-u M-&' insert the output in the current buffer?

Message #22 received at 57792 <at> debbugs.gnu.org (full text, mbox):

From: Vladimir Nikishkin <lockywolf <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 57792 <at> debbugs.gnu.org, Stefan Kangas <stefankangas <at> gmail.com>
Subject: Re: bug#57792: 29.0.50; async-shell-command fails with
 prefix-argument on -master
Date: Wed, 14 Sep 2022 22:17:23 +0800

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> Stefan Kangas <stefankangas <at> gmail.com> writes:
>
>> I can reproduce this bug on master, 27.1 and 28.2.  Here's a test case
>> (not tested):
>>
>> (ert-deftest simple-tests-async-shell-command-57792 ()
>>   "Test for https://debbugs.gnu.org/57792 ."
>>   (with-temp-buffer
>>     ;; Pretend we have a prefix argument.
>>     (async-shell-command "echo \"test\"" '(4))
>>     (should (equal (buffer-string) "test"))))
>>
>> I'm not sure what behavior we want here, though.  Should we insert the
>> command output directly at point in the current buffer, or should we
>> first insert it into "*Async Shell Command*" and copy it over when done?
>
> The prefix isn't documented to do anything (and currently bugs out), so
> perhaps we should just remove the prefix from the interactive spec
> instead?

> Is the intention that `C-u M-&' insert the output in the current buffer?

I am quite sure it used to do that in the past. Perhaps, as late as
27.2. I can try to do a bisect to find when exactly this has changed.
Moreover, it would be analogous to C-u M-: inserting the return value
into the buffer at point.

-- 
Your sincerely,
Vladimir Nikishkin (MiEr, lockywolf)
(Laptop)

Message #25 received at 57792 <at> debbugs.gnu.org (full text, mbox):

From: Vladimir Nikishkin <lockywolf <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 57792 <at> debbugs.gnu.org, Stefan Kangas <stefankangas <at> gmail.com>
Subject: Re: bug#57792: 29.0.50; async-shell-command fails with
 prefix-argument on -master
Date: Wed, 14 Sep 2022 22:36:19 +0800

Maybe I am confusing it with C-u M-! , but for the async version would
do the same would make sense.

Vladimir Nikishkin <lockywolf <at> gmail.com> writes:

> Lars Ingebrigtsen <larsi <at> gnus.org> writes:
>
>> Stefan Kangas <stefankangas <at> gmail.com> writes:
>>
>>> I can reproduce this bug on master, 27.1 and 28.2.  Here's a test case
>>> (not tested):
>>>
>>> (ert-deftest simple-tests-async-shell-command-57792 ()
>>>   "Test for https://debbugs.gnu.org/57792 ."
>>>   (with-temp-buffer
>>>     ;; Pretend we have a prefix argument.
>>>     (async-shell-command "echo \"test\"" '(4))
>>>     (should (equal (buffer-string) "test"))))
>>>
>>> I'm not sure what behavior we want here, though.  Should we insert the
>>> command output directly at point in the current buffer, or should we
>>> first insert it into "*Async Shell Command*" and copy it over when done?
>>
>> The prefix isn't documented to do anything (and currently bugs out), so
>> perhaps we should just remove the prefix from the interactive spec
>> instead?
>
>> Is the intention that `C-u M-&' insert the output in the current buffer?
>
> I am quite sure it used to do that in the past. Perhaps, as late as
> 27.2. I can try to do a bisect to find when exactly this has changed.
> Moreover, it would be analogous to C-u M-: inserting the return value
> into the buffer at point.


-- 
Your sincerely,
Vladimir Nikishkin (MiEr, lockywolf)
(Laptop)

Message #28 received at 57792 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Vladimir Nikishkin <lockywolf <at> gmail.com>
Cc: 57792 <at> debbugs.gnu.org, Stefan Kangas <stefankangas <at> gmail.com>
Subject: Re: bug#57792: 29.0.50; async-shell-command fails with
 prefix-argument on -master
Date: Wed, 14 Sep 2022 17:10:44 +0200

Vladimir Nikishkin <lockywolf <at> gmail.com> writes:

> Maybe I am confusing it with C-u M-! , but for the async version would
> do the same would make sense.

The problem is basically the same with M-! asynchronously --
`C-u M-! echo hello &' will also bug out.

So inserting things into the current buffer asynchronously has possibly
never worked?

The issue here is that in the async case, we set up a sentinel to handle
the output, and we also erase the output buffer, and we set the mode to
shell-mode.

I think it should be able to make this work (I think it'd be nice to
have), but I think it requires some serious rewriting of this code...

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Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.