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Re: Emacs crashing on C-x C-g


On 25/10/2012 10:40 AM, Ken Brown wrote:
On 10/24/2012 5:26 PM, Ryan Johnson wrote:
On 24/10/2012 5:01 PM, Ken Brown wrote:
On 10/24/2012 9:09 AM, Ryan Johnson wrote:
On 01/10/2012 4:08 PM, Ryan Johnson wrote:
> On 01/10/2012 3:07 PM, Ken Brown wrote:
>> On 10/1/2012 2:51 PM, Ryan Johnson wrote:
>>> I'm hitting a strange behavior with emacs lately, where hitting
>>> C-x C-g [1] sometimes causes it to quit instantly: no request to
>>> save files, no seg fault, no error message, just gone (have to
>>> reset the terminal to clear out emacs' ncurses settings). It
>>> invariably happens after I've been away from the terminal for a
>>> while (days) and then come back use it again.
>>>
>>> has anyone else had this happen to them?
>> I haven't seen it, and I do leave emacs running for days or weeks.
>> But I almost always run emacs under X, not in a terminal. Also, I
>> generally use the latest Cygwin snapshot. Have you tried that?
>> Maybe you're being bitten by the /etc problem that Corinna fixed in
>> late July (http://cygwin.com/ml/cygwin/2012-07/msg00666.html).
> OK, I'll give the snapshot a try when I get a chance.


Rats. I thought it was working, but the problem just it again. This time
the emacs session had just been created by a mercurial check-in (to edit
the changelog message) and crashed when I hit C-g to cancel an ESC I no
longer needed.

This time the crash is reproducible, and the test case below paints an
"interesting" story:

EDITOR='emacs -q -nw' hg ci
ESC C-g
<<<crash>>>
reset
<<<"reset is control-G (^G).">>>
EDITOR='emacs -q -nw' hg ci
C-g
<<<"interrupted!">>>
reset -i ^c
<<<no message>>>
cat
C-g
<<<"Quit (core dumped)">>>

This looks like a known Emacs issue:

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=12697

I imagine it will be fixed before the release of Emacs 24.3.
Agree the initial part is emacs. But I suspect the confused bash
business is not. ^G should either send SIGINT or not, this core dump
thing is not cool.

Do you know whether this is Cygwin-specific? Have you checked to see what happens on Linux?
Oops, you're right: I see the exact same behavior on linux. However, that's via ssh in a mintty window, so it could still be mintty. Can somebody running Linux directly verify, perhaps?

Ryan


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