Clipboard hang on w32

[Jason Rumney]

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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:



I have noticed today that while pasting from Emacs to other apps, the 
other app seems to hang until some input event occurs in Emacs (normally 
when I switch to it and click on the window).
I suspect that the cause is the recent changes to sit-for. I cannot 
reproduce the problem in emacs -Q, so there is probably some code using 
sit-for inappropriately, but still, I think it is a bug that sit-for 
prevents clipboard operations from proceeding normally.

I'll investigate this later when I get time, but if someone who knows 
the relevant code can advise on what I should do to interrupt sit-for on 
clipboard operations and any other OS events that might have the same 
problem, it would be appreciated.



If emacs crashed, and you have the emacs process in the gdb debugger,
please include the output from the following gdb commands:
   `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
c:/emacs/etc/DEBUG for instructions.


In GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600)
of 2006-08-28 on JASONR
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/gnuwin32/include'

Important settings:
 value of $LC_ALL: nil
 value of $LC_COLLATE: nil
 value of $LC_CTYPE: nil
 value of $LC_MESSAGES: nil
 value of $LC_MONETARY: nil
 value of $LC_NUMERIC: nil
 value of $LC_TIME: nil
 value of $LANG: en_GB
 locale-coding-system: cp1252
 default-enable-multibyte-characters: t

Major mode: nXML

Minor modes in effect:
 ecb-minor-mode: t
 cua-mode: t
 recentf-mode: t
 show-paren-mode: t
 encoded-kbd-mode: t
 tooltip-mode: t
 tool-bar-mode: t
 mouse-wheel-mode: t
 menu-bar-mode: t
 file-name-shadow-mode: t
 global-font-lock-mode: t
 font-lock-mode: t
 blink-cursor-mode: t
 unify-8859-on-encoding-mode: t
 utf-translate-cjk-mode: t
 auto-compression-mode: t
 line-number-mode: t
 transient-mark-mode: t

Recent input:
s c C-s C-s C-s C-s C-s C-s <up> <right> <down-mouse-1>
<mouse-movement> <mouse-movement> <help-echo> <mouse-movement>
<help-echo> <help-echo> <mouse-movement> <help-echo>
<mouse-movement> <mouse-movement> <mouse-movement>
<help-echo> <mouse-movement> <mouse-movement> <mouse-movement>
<help-echo> <mouse-movement> <help-echo> <mouse-movement>
<mouse-movement> <mouse-movement> <mouse-movement>
<drag-mouse-1> <down-mouse-1> <mouse-1> <help-echo>
<help-echo> <help-echo> <down-mouse-1> <mouse-1> <help-echo>
<help-echo> <help-echo> <help-echo> <down-mouse-1>
<mouse-1> <down-mouse-1> <mouse-movement> <mouse-movement>
<drag-mouse-1> <escape> w <help-echo> <help-echo> <down-mouse-1>
<mouse-1> <help-echo> <help-echo> <down-mouse-1> <mouse-1>
<prior> <up> <up> <up> <up> <up> <up> <up> <up> <up>
<down> <down> <S-down> <S-down> <S-down> <S-down> <S-down>
<S-down> <S-down> <S-down> <S-down> <S-down> <escape>
w <down-mouse-1> <mouse-movement> <drag-mouse-1> <help-echo>
<help-echo> <escape> x r e p o <tab> r <tab> <retu
rn>

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