bug#16832: 24.3.50; Emacs goes crazy when deleting lines

["Fabrice Niessen" <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>]

Eli Zaretskii wrote:
>> From: "Fabrice Niessen" <fni-news-TA4HMoP+1wHrZ44/DZwexQ@public.gmane.org>
>> Cc: 16832-ubl+/3LiMTaZdePnXv/OxA@public.gmane.org
>> Date: Mon, 24 Feb 2014 11:58:13 +0100
>> 
>> > The screencast doesn't show which major mode is active in that buffer,
>> > and which minor modes.  Can you tell?
>> 
>> Major mode: Org.
>
> This alone is not enough, I guess the key is in one of the minor
> modes.
>
>> > Can you reproduce this in "emacs -Q"?  If so, please post a complete
>> > recipe.
>> 
>> Not yet reproducible in a minimal Emacs file.
>> 
>> > FWIW, just visiting the file you attached and repeating C-k series
>> > didn't reproduce the problem with today's trunk.
>> 
>> Though, one extra data point: switching to Text mode (instead of
>> Org [1]) before pressing my C-k does NOT exhibit the problem...
>
> Yes, but Org alone in "emacs -Q" is not enough, either.
>
> One thing to try is to set debug-on-quit to a non-nil value, repeat
> the steps to reproduce the problem, then type C-g.  If all goes well,
> you should see a Lisp backtrace that might shed some light on this.

Euh, that brought me once:

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (quit)
--8<---------------cut here---------------end--------------->8---

Very disappointing in this case...

On other trials, C-g stays unresponsive: nothing happens, I can type
10's of them in a row, and Emacs still does not react.

And, in fact, I discovered that it does not infloop: Emacs gives me
control back after around one minute...

Best regards.