bug#6945: active-minibuffer-window returns nil when prompt overwritten by message

[Lennart Borgman]

On Mon, Aug 30, 2010 at 2:44 PM, Stephen Berman <stephen.berman@gmx.net> wrote:
> On Mon, 30 Aug 2010 12:30:37 +0200 Lennart Borgman 
> <lennart.borgman@gmail.com> wrote:
>
>> Eval the following
>>
>>
>> (defun temp-active-mb ()
>>   (message "active-minibuffer-window = %s" (active-minibuffer-window)))
>>
>> (progn
>>   (run-with-idle-timer 1 nil 'message "idle message")
>>   (run-with-idle-timer 2 nil 'temp-active-mb)
>>   (y-or-n-p "Prompt: ")
>>   )
>>
>> This gives me the message "active-minibuffer-window = nil".
>
> When I eval the above sexps on GNU Emacs 24.0.50.1 (i686-pc-linux-gnu,
> GTK+ Version 2.18.6) of 2010-08-22 on escher, I first briefly see the
> message "Prompt: (y or n)", then "idle message", then
> "active-minibuffer-window = " with the cursor after "= "; as soon as I
> type any other key, I get "Prompt: (y or n)" again.
>
>> Is there any way then to discover whether Emacs is displaying a prompt
>> and waiting for input?
>
> Are you trying this on MS-Windows?  If so, it seems to be a problem
> there.

Thanks Stephen. However it looks to me from what you write above like
active-minibuffer-window does not return a window in this case on
GNU/Linux either.