With my one-liner test, using your patch, I finish up with a terminal
session (as expected) with an error message "Display :0 does not exist" in
the minibuffer (not expected). In the *Messages* buffer, it's recorded as
"get-device-terminal: Display :0 does not exist", though it didn't display
that way initially in the minibuffer.

I set a breakpoint on XUnloadFont as requested, and "font" doesn't appear
to be a valid pointer; is it supposed to be a resource id maybe?


On Thu, Jun 5, 2014 at 12:53 AM, Dmitry Antipov <dmantipov@yandex.ru> wrote:

> On 06/05/2014 01:49 AM, Ken Raeburn wrote:
>
>  A simpler reproduction just worked for me:
>>
>> emacs -Q -nw
>>
>> in the scratch buffer, evaluate:
>>
>> (let ((f (make-frame-on-display ":0" '((font . "7x14")))))
>>    (delete-frame f))
>>
>> That's killed my Emacs processes pretty reliably.
>>
>> Simpler still:
>>
>> $ emacs -Q -nw --eval '(let ((f (make-frame-on-display ":0" '"'"'((font .
>> "7x14"))))) (delete-frame f))'
>>
>> The terminal window gets a frame, the X display gets a frame, the X
>> frame goes away, and the terminal-mode Emacs crashes.
>>
>
> Please try this against emacs-24 branch or 24.3.91 (this is a backported
> hybrid of trunk commits 116927 and 117126). If that works for you, this
> should be incorporated into emacs-24 and included into the next pretest.
>
> Dmitry
>
>