bug#21965: 24.5; Emacs freezes when canceling at open file

[Maneesh Yadav <maneeshkyadav@gmail.com>]

Hi John,
I'm running in a mac environment with nothing really going on in the
background (a web browser, mail, another shell or two open with
prompt).  No tramp or fancy filesystem stuff or anything (even without
-Q I think my startup is fairly modest).  I should correct my
replication path, I believe I am pressing Ctrl-g-g...but I've
replicated the bug with mashing Ctrl-gs when the minibuffer is waiting
for input, not clear that the minibuffer is the only context this
happens.

Thanks so much for your fast response, I hope this is real bug.  I
held off on reporting it for awhile since I wanted to be sure it
wasn't something idiotic I am doing.

> This doesn't seem completely repeatable (but I did just do it on my first
> try just now): I start 'emacs -Q' and Ctrl-x Ctrl-f to see a prompt in the
> minibuffer for a file and then Ctrl-g-g then emacs freezes (does not
> respond to Ctrl-g or any keystrokes...I don't think I'm naively invoking an
> process control key binding (checked with stty-a).

On Fri, Nov 20, 2015 at 1:37 PM, John Wiegley <jwiegley@gmail.com> wrote:
>>>>>> Maneesh Yadav <maneeshkyadav@gmail.com> writes:
>
>> I was experiencing frequent 'freezing' after pressing 'Ctrl-g-g' (I think I
>> have defaulted to pressing twice to make sure I've cancelled out of partial
>> command, seeing "quit" makes me feel happier than "C-x C-g is undefined").
>
> Only twice? I think my default right now is 10-20 times, just for that extra
> satisfying feel.
>
>> This doesn't seem completely repeatable (but I did just do it on my first
>> try just now): I start 'emacs -Q' and Ctrl-x Ctrl-f to see a prompt in the
>> minibuffer for a file and then Ctrl-g Ctrl-g then emacs freezes (does not
>> respond to Ctrl-g or any keystrokes...I don't think I'm naively invoking an
>> process control key binding (checked with stty-a).
>
> I've experienced deadlocks in the past as well, although recently there have
> been none. What else are you doing when this happens? Are you using tramp,
> running any background processes, etc.?
>
> John