GNU bug report logs - #41624
28.0.50; wdired-change-to-wdired-mode sometimes infloops

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Package: emacs; Reported by: Michael Heerdegen <michael_heerdegen@HIDDEN>; dated Sun, 31 May 2020 04:48:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Michael Heerdegen <michael_heerdegen@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
 <87sga55kel.fsf@HIDDEN> <87imb1gpar.fsf@HIDDEN>
 <878sbxi34x.fsf@HIDDEN> <874kmli1bl.fsf@HIDDEN>
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 Oct 2020 14:17:18 +0200")
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 Content preview: Michael Heerdegen <michael_heerdegen@HIDDEN> writes: > I
 found
 out that the infloop can be fixed easily if we change > `find-dired-sentinel'
 to let the buffer end in a newline. [...] 
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Michael Heerdegen <michael_heerdegen@HIDDEN> writes:

> I found out that the infloop can be fixed easily if we change
> `find-dired-sentinel' to let the buffer end in a newline.

[...]

>> Then I can change permissions with wdired, I only still get the
>> inappropriate message that it would have failed, though it has
>> succeeded.
>
> Hah, and this issue is also present in a "standard" dired buffer.
>
> So, apart from the missing newline at the end of the find-dired buffer,
> I see no difference to regular dired buffers.

Ah, then I think this should indeed be fixed (changing
`find-dired-sentinel' sounds good to me).  Are you pushing a fix for
this?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.

Message received at 41624 <at> debbugs.gnu.org:


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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
 <87sga55kel.fsf@HIDDEN> <87imb1gpar.fsf@HIDDEN>
 <878sbxi34x.fsf@HIDDEN> <874kmli1bl.fsf@HIDDEN>
Date: Fri, 23 Oct 2020 15:18:33 +0200
In-Reply-To: <874kmli1bl.fsf@HIDDEN> (Michael Heerdegen's message of "Fri, 23
 Oct 2020 14:17:18 +0200")
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Michael Heerdegen <michael_heerdegen@HIDDEN> writes:

> Then I can change permissions with wdired, I only still get the
> inappropriate message that it would have failed, though it has
> succeeded.

Hah, and this issue is also present in a "standard" dired buffer.

So, apart from the missing newline at the end of the find-dired buffer,
I see no difference to regular dired buffers.

Michael.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.

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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
 <87sga55kel.fsf@HIDDEN> <87imb1gpar.fsf@HIDDEN>
 <878sbxi34x.fsf@HIDDEN>
Date: Fri, 23 Oct 2020 14:17:18 +0200
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 Oct 2020 13:38:06 +0200")
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Michael Heerdegen <michael_heerdegen@HIDDEN> writes:

> I didn't say renaming doesn't work, I only got that inappropriate
> message.  Maybe just because I had edited the buffer by hand to make the
> loop terminate.

I found out that the infloop can be fixed easily if we change
`find-dired-sentinel' to let the buffer end in a newline.

Then I can change permissions with wdired, I only still get the
inappropriate message that it would have failed, though it has
succeeded.

Michael.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.

Message received at 41624 <at> debbugs.gnu.org:


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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
 <87sga55kel.fsf@HIDDEN> <87imb1gpar.fsf@HIDDEN>
Date: Fri, 23 Oct 2020 13:38:06 +0200
In-Reply-To: <87imb1gpar.fsf@HIDDEN> (Lars Ingebrigtsen's message of "Fri,
 23 Oct 2020 13:22:20 +0200")
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Lars Ingebrigtsen <larsi@HIDDEN> writes:

> > I can't answer that, but I can tell that when I manually delete the last
> > lines of text and whitespace in such a buffer (saying "find finished
> > ..."), it works as expected (though I'm getting a message saying that "1
> > rename actions failed").  But I'm definitely able to change permissions
> > with wdired then.  So it seems possible to make the feature work, the
> > infloop results from the unsuitable termination condition of the loop in
> > `wdired-preprocess-perms'.
>
> If even renaming doesn't work, then it does sound like this was never
> supposed to be a command that's applicable to dired-find buffers, I
> think?

I didn't say renaming doesn't work, I only got that inappropriate
message.  Maybe just because I had edited the buffer by hand to make the
loop terminate.

I'm not convinced that this is not an intended use case. - on the
contrary.  Everything works, basically, it just seems that some details
in the code are not prepared for some things that are slightly
different, e.g. the final line in those buffers.

Please don't just signal an error unless you are really sure that this
never worked and was never intended to work, and is not easy to fix.

Regards,

Michael.




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bug#41624; Package emacs. Full text available.

Message received at 41624 <at> debbugs.gnu.org:


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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Stefan Kangas <stefankangas@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
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X-Now-Playing: Ossia's _Devil's Dance_: "(untitled)"
Date: Fri, 23 Oct 2020 13:22:52 +0200
In-Reply-To: <CADwFkmn2RMryOKPF=Ov8H7H=T2iH+d0rGoH3Krmko9qt3W-D8Q@HIDDEN>
 (Stefan Kangas's message of "Fri, 23 Oct 2020 11:15:54 +0000")
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 Content preview: Stefan Kangas <stefankangas@HIDDEN> writes: > If it never
 works, it's of course better to signal an error than > inflooping or doing
 something broken. Yes, I'm leaning towards signalling an error here. 
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Stefan Kangas <stefankangas@HIDDEN> writes:

> If it never works, it's of course better to signal an error than
> inflooping or doing something broken.

Yes, I'm leaning towards signalling an error here.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Michael Heerdegen <michael_heerdegen@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
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X-Now-Playing: Ossia's _Devil's Dance_: "(untitled)"
Date: Fri, 23 Oct 2020 13:22:20 +0200
In-Reply-To: <87sga55kel.fsf@HIDDEN> (Michael Heerdegen's message of "Fri, 23
 Oct 2020 12:03:30 +0200")
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 works as expected (though I'm getting a me [...] 
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Michael Heerdegen <michael_heerdegen@HIDDEN> writes:

> I can't answer that, but I can tell that when I manually delete the last
> lines of text and whitespace in such a buffer (saying "find finished
> ..."), it works as expected (though I'm getting a message saying that "1
> rename actions failed").  But I'm definitely able to change permissions
> with wdired then.  So it seems possible to make the feature work, the
> infloop results from the unsuitable termination condition of the loop in
> `wdired-preprocess-perms'.

If even renaming doesn't work, then it does sound like this was never
supposed to be a command that's applicable to dired-find buffers, I
think?

On the other hand, if this did work, then it'd be pretty nice.  But it
sounds less like a bug fix and more like a new feature.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




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Subject: Re: bug#41624: 28.0.50;
 wdired-change-to-wdired-mode sometimes infloops
To: Lars Ingebrigtsen <larsi@HIDDEN>,
 Michael Heerdegen <michael_heerdegen@HIDDEN>
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Lars Ingebrigtsen <larsi@HIDDEN> writes:

> This bug is still present on the trunk, but I'm not quite sure whether
> this is supposed to be supported or not?  The find-dired buffers aren't
> very much like normal dired buffers...  so should wdired just signal an
> error here?

I think it would be a very nice feature to have, though.

Does it ever work?  If so, perhaps we should signal an error only for
the cases where we know it doesn't?  If we can easily decide that...

If it never works, it's of course better to signal an error than
inflooping or doing something broken.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.

Message received at 41624 <at> debbugs.gnu.org:


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From: Michael Heerdegen <michael_heerdegen@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN> <87tuuml6jy.fsf@HIDDEN>
Date: Fri, 23 Oct 2020 12:03:30 +0200
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Lars Ingebrigtsen <larsi@HIDDEN> writes:

> > M-x find-dired ~/ RET -iname \*.pdf RET  (any find-dired buffer will do)
> >
> > M-: (setq wdired-allow-to-change-permissions 'advanced) RET
> >
> > M-x wdired-change-to-wdired-mode RET
> >
> >   ==> infloop
>
> This bug is still present on the trunk, but I'm not quite sure whether
> this is supposed to be supported or not?  The find-dired buffers aren't
> very much like normal dired buffers...  so should wdired just signal an
> error here?

I can't answer that, but I can tell that when I manually delete the last
lines of text and whitespace in such a buffer (saying "find finished
..."), it works as expected (though I'm getting a message saying that "1
rename actions failed").  But I'm definitely able to change permissions
with wdired then.  So it seems possible to make the feature work, the
infloop results from the unsuitable termination condition of the loop in
`wdired-preprocess-perms'.

Michael.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.

Message received at 41624 <at> debbugs.gnu.org:


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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Michael Heerdegen <michael_heerdegen@HIDDEN>
Subject: Re: bug#41624: 28.0.50; wdired-change-to-wdired-mode sometimes
 infloops
References: <87v9kcd83c.fsf@HIDDEN>
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Date: Thu, 22 Oct 2020 15:43:45 +0200
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 is a recipe for emacs -Q: > > M-x find-dired ~/ RET -iname \*.pdf RET (any
 find-dired buffer will do) > > M-: (setq wdired-allow-to-change-permissions
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Michael Heerdegen <michael_heerdegen@HIDDEN> writes:

> here is a recipe for emacs -Q:
>
> M-x find-dired ~/ RET -iname \*.pdf RET  (any find-dired buffer will do)
>
> M-: (setq wdired-allow-to-change-permissions 'advanced) RET
>
> M-x wdired-change-to-wdired-mode RET
>
>   ==> infloop

This bug is still present on the trunk, but I'm not quite sure whether
this is supposed to be supported or not?  The find-dired buffers aren't
very much like normal dired buffers...  so should wdired just signal an
error here?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.

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Hello,

here is a recipe for emacs -Q:

M-x find-dired ~/ RET -iname \*.pdf RET  (any find-dired buffer will do)

M-: (setq wdired-allow-to-change-permissions 'advanced) RET

M-x wdired-change-to-wdired-mode RET

  ==> infloop

TIA,

Michael.



In GNU Emacs 28.0.50 (build 102, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0)
 of 2020-05-31 built on drachen
Repository revision: 61617ac7957e7f909086ed72ce1cd43701ecf18a
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid





Acknowledgement sent to Michael Heerdegen <michael_heerdegen@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#41624; Package emacs. Full text available.
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