Bug in 26.1 related to X clipboard and `yank'?

Bug in 26.1 related to X clipboard and `yank'?

[Joseph Mingrone]

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Hello,

Here is a recipe that almost but not always reproduces the potential
bug.

;; Start a server and open a client frame
1. emacs -Q  --daemon
2. emacsclient -nc
;; Open a second Emacs (not client/daemon)
3. emacs -Q
4. From some application other than Emacs, copy text to the X clipboard.
5. Yank the text from the clipboard somewhere in the client frame (this works).
6. Add some text somewhere in the second Emacs frame and run `kill-ring-save' to put it on the X clipboard.
7. ** Ruining `yank' in the client frame does not yank the text on the X clipboard. **

I do not recall this being a problem in previous versions, but I cannot
say for certain.  Is this bug-report worthy?

Joseph

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Re: Bug in 26.1 related to X clipboard and `yank'?

[Brett Gilio]

Joseph Mingrone writes:

> Hello,
>
> Here is a recipe that almost but not always reproduces the 
> potential
> bug.
>
> ;; Start a server and open a client frame
> 1. emacs -Q  --daemon
> 2. emacsclient -nc
> ;; Open a second Emacs (not client/daemon)
> 3. emacs -Q
> 4. From some application other than Emacs, copy text to the X 
> clipboard.
> 5. Yank the text from the clipboard somewhere in the client 
> frame (this works).
> 6. Add some text somewhere in the second Emacs frame and run 
> `kill-ring-save' to put it on the X clipboard.
> 7. ** Ruining `yank' in the client frame does not yank the text 
> on the X clipboard. **
>
> I do not recall this being a problem in previous versions, but I 
> cannot
> say for certain.  Is this bug-report worthy?
>
> Joseph

Hi Joseph,

Are you getting any errors or messages after you yank the text 
with the
second client open?

-- 
Brett M. Gilio
Free Software Foundation, Member
https://parabola.nu | https://emacs.org

Re: Bug in 26.1 related to X clipboard and `yank'?

[Joseph Mingrone]

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Brett Gilio <brettg@posteo.net> writes:

> Joseph Mingrone writes:

>> Hello,

>> Here is a recipe that almost but not always reproduces the potential
>> bug.

>> ;; Start a server and open a client frame
>> 1. emacs -Q  --daemon
>> 2. emacsclient -nc
>> ;; Open a second Emacs (not client/daemon)
>> 3. emacs -Q
>> 4. From some application other than Emacs, copy text to the X clipboard.
>> 5. Yank the text from the clipboard somewhere in the client frame (this works).
>> 6. Add some text somewhere in the second Emacs frame and run `kill-ring-save' to put it on the X clipboard.
>> 7. ** Ruining `yank' in the client frame does not yank the text on the X clipboard. **

>> I do not recall this being a problem in previous versions, but I cannot
>> say for certain.  Is this bug-report worthy?

>> Joseph

> Hi Joseph,

> Are you getting any errors or messages after you yank the text with the
> second client open?

Hi Brett,

I should have mentioned that no errors are reported, but in 7. the text from 4. (and not 6.) is again yanked into the buffer.  I can also replace 7. with:

7a. Go to a terminal and run 'xclip -selection clipboard -o' to confirm that the text from 6. is on the clipboard.
7b. Run `clipboard-yank' and the text from 4. is again yanked into the buffer.

Joseph

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Re: Bug in 26.1 related to X clipboard and `yank'?

[Eli Zaretskii]

> From: Joseph Mingrone <jrm@ftfl.ca>
> Date: Thu, 26 Jul 2018 21:38:46 -0300
> Cc: emacs-devel@gnu.org
> 
> I should have mentioned that no errors are reported, but in 7. the text from 4. (and not 6.) is again yanked into the buffer.  I can also replace 7. with:
> 
> 7a. Go to a terminal and run 'xclip -selection clipboard -o' to confirm that the text from 6. is on the clipboard.

Does xclip tell you which application is the owner of the text in the
clipboard?

Re: Bug in 26.1 related to X clipboard and `yank'?

[Joseph Mingrone]

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Eli Zaretskii <eliz@gnu.org> writes:

>> From: Joseph Mingrone <jrm@ftfl.ca>
>> Date: Thu, 26 Jul 2018 21:38:46 -0300
>> Cc: emacs-devel@gnu.org

>> I should have mentioned that no errors are reported, but in 7. the text from 4. (and not 6.) is again yanked into the buffer.  I can also replace 7. with:

>> 7a. Go to a terminal and run 'xclip -selection clipboard -o' to confirm that the text from 6. is on the clipboard.

> Does xclip tell you which application is the owner of the text in the
> clipboard?

It doesn't.

I tried the same recipe, but with a recent build from the master branch (9593108) instead of 26.1.  The `yank' in the last step does yank the text on the X clipboard.

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Re: Bug in 26.1 related to X clipboard and `yank'?

[Eli Zaretskii]

> From: Joseph Mingrone <jrm@ftfl.ca>
> Cc: brettg@posteo.net,  emacs-devel@gnu.org
> Date: Fri, 27 Jul 2018 15:34:10 -0300
> 
> I tried the same recipe, but with a recent build from the master branch (9593108) instead of 26.1.  The `yank' in the last step does yank the text on the X clipboard.

Then I guess the bug is somehow fixed on master?

Re: Bug in 26.1 related to X clipboard and `yank'?

[Joseph Mingrone]

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Eli Zaretskii <eliz@gnu.org> writes:

>> From: Joseph Mingrone <jrm@ftfl.ca>
>> Cc: brettg@posteo.net,  emacs-devel@gnu.org
>> Date: Fri, 27 Jul 2018 15:34:10 -0300

>> I tried the same recipe, but with a recent build from the master branch (9593108) instead of 26.1.  The `yank' in the last step does yank the text on the X clipboard.

> Then I guess the bug is somehow fixed on master?

It seems so.  After about 20 minutes of searching the commit logs of the master and emacs-26 branches, no obvious commit that fixes the problem stands out though.

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Re: Bug in 26.1 related to X clipboard and `yank'?

[Eli Zaretskii]

> From: Joseph Mingrone <jrm@ftfl.ca>
> Date: Fri, 27 Jul 2018 18:19:01 -0300
> Cc: brettg@posteo.net, emacs-devel@gnu.org
> 
> > Then I guess the bug is somehow fixed on master?
> 
> It seems so.  After about 20 minutes of searching the commit logs of the master and emacs-26 branches, no obvious commit that fixes the problem stands out though.

You could try bisecting.  Not sure it's worth the hassle, though.

Re: Bug in 26.1 related to X clipboard and `yank'?

[Joseph Mingrone]

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Eli Zaretskii <eliz@gnu.org> writes:

>> From: Joseph Mingrone <jrm@ftfl.ca>
>> Date: Fri, 27 Jul 2018 18:19:01 -0300
>> Cc: brettg@posteo.net, emacs-devel@gnu.org

>> > Then I guess the bug is somehow fixed on master?

>> It seems so.  After about 20 minutes of searching the commit logs of the master and emacs-26 branches, no obvious commit that fixes the problem stands out though.

> You could try bisecting.  Not sure it's worth the hassle, though.

The master branch takes (me) about 15 minutes to build [1], so bisecting could take some time.

[1] http://pkg.awarnach.mathstat.dal.ca/data/11amd64-default/2018-07-27_14h37m35s/logs/emacs-devel-27.0.50.20180715,2.log

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