bug#32922: Echo area flickers when receiving data in network process

bug#32922: Echo area flickers when receiving data in network process

[Mitchell Plamann]

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Steps to reproduce:
  - Open "emacs -Q"
  - Eval (make-network-process :name "foo" :server t :service 8080 :family
'ipv4)
  - Press "C-x 5". After a few seconds, the echo area will display "C-x 5-".
  - In another terminal, run "yes | nc localhost 8080"
  - The "5-" in the echo area will begin to flicker.

I've tested this in emacs 25.3 and 26.1.

As far as I've been able to tell, the data coming in to the network process
triggers [read_key_sequence] in [keyboard.c] to replay the "C-x 5"
sequence. As part of this replay, it outputs "C-x", then "C-x 5", then "C-x
5-" to the echo area, which causes the "5-" to look like it is flickering.

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bug#32922: Echo area flickers when receiving data in network process

[Eli Zaretskii]

> From: Mitchell Plamann <mplamann@janestreet.com>
> Date: Wed, 3 Oct 2018 13:57:15 -0400
> 
> Steps to reproduce:
>   - Open "emacs -Q"
>   - Eval (make-network-process :name "foo" :server t :service 8080 :family 'ipv4)
>   - Press "C-x 5". After a few seconds, the echo area will display "C-x 5-".
>   - In another terminal, run "yes | nc localhost 8080"
>   - The "5-" in the echo area will begin to flicker.
> 
> I've tested this in emacs 25.3 and 26.1.
> 
> As far as I've been able to tell, the data coming in to the network process triggers [read_key_sequence] in
> [keyboard.c] to replay the "C-x 5" sequence. As part of this replay, it outputs "C-x", then "C-x 5", then "C-x 5-"
> to the echo area, which causes the "5-" to look like it is flickering.

This is deliberate, the code is explicitly written to replay the key
sequence.  For more about this, see

  http://lists.gnu.org/archive/html/emacs-devel/2018-09/msg00906.html

bug#32922: Echo area flickers when receiving data in network process

[Stefan Kangas]

tags 32922 + notabug
close 32922

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Mitchell Plamann <mplamann@janestreet.com>
>> Date: Wed, 3 Oct 2018 13:57:15 -0400
>>
>> Steps to reproduce:
>>   - Open "emacs -Q"
>>   - Eval (make-network-process :name "foo" :server t :service 8080 :family 'ipv4)
>>   - Press "C-x 5". After a few seconds, the echo area will display "C-x 5-".
>>   - In another terminal, run "yes | nc localhost 8080"
>>   - The "5-" in the echo area will begin to flicker.
>>
>> I've tested this in emacs 25.3 and 26.1.
>>
>> As far as I've been able to tell, the data coming in to the network process triggers [read_key_sequence] in
>> [keyboard.c] to replay the "C-x 5" sequence. As part of this replay, it outputs "C-x", then "C-x 5", then "C-x 5-"
>> to the echo area, which causes the "5-" to look like it is flickering.
>
> This is deliberate, the code is explicitly written to replay the key
> sequence.  For more about this, see
>
>   http://lists.gnu.org/archive/html/emacs-devel/2018-09/msg00906.html

Since this is intended behaviour, I'm closing this as notabug.

Best regards,
Stefan Kangas