Blocking call to accept-process-output with quit inhibited!!

Blocking call to accept-process-output with quit inhibited!!

[Leo Liu]

After this change

* comint.el (comint-redirect-results-list-from-process): Fix random
  delay.

I am seeing "Blocking call to accept-process-output with quit
inhibited!!" from time to time.

How does this mean? I can't see where comint has inhibited quit.

Leo

Re: Blocking call to accept-process-output with quit inhibited!!

[Leo Liu]

Might be my fault. Feel free to ignore this.

Leo

Re: Blocking call to accept-process-output with quit inhibited!!

[Stefan Monnier]

> * comint.el (comint-redirect-results-list-from-process): Fix random
>   delay.
> I am seeing "Blocking call to accept-process-output with quit
> inhibited!!" from time to time.
> How does this mean?

Just what it says: a call to accept-process-output was done at a time
when quit is inhibited, and the call can block, thus rendering Emacs
completely unresponsive.

> I can't see where comint has inhibited quit.

quit is inhibited when running timers, process-filters and other
such asynchronous events.
So comint doesn't need to inhibit-quit itself for such a warning to show
up, if its code is executed from a process-filter.

Try to figure out how/when a process-filter (or timer...) can end up
running the while + accept-process-output loop, and then think about
whether that really should happen, and if so make sure the
process-filter (or timer...) uses with-local-quit before running
that loop.


        Stefan

Re: Blocking call to accept-process-output with quit inhibited!!

[Leo Liu]

On 2013-06-21 22:54 +0800, Stefan Monnier wrote:
> Try to figure out how/when a process-filter (or timer...) can end up
> running the while + accept-process-output loop, and then think about
> whether that really should happen, and if so make sure the
> process-filter (or timer...) uses with-local-quit before running
> that loop.

Thanks, this helps.

Leo