bug#11021: 23.4; Text client hangs when region is highlighted in another frame with mouse

[Phil Brooke]

Hi,

The problem: Highlighting some text in an X frame using the mouse appears 
to cause text clients to freeze until the region is deactivated.

Replicating the problem:

   I started a freshly-built version of emacs 23.4 with
     ./emacs -q
   Inside emacs, I started a server:
     M-x server-start

   I now write some text into the *scratch* buffer (of an X frame) and
   highlight it with the mouse (hold mouse button 1, sweep across text,
   release button 1).

   In another xterm, I run
     ./emacsclient -t
   The text mode client appears to freeze until I return to the original
   frame and press C-g, type some text or other actions to cause the
   highlighting to disappear.  Any input I typed into the text client is
   handled at this point.

   While emacsclient -t is running, if I now highlight some text with the
   mouse in a frame again, it causes the text mode client to freeze.

Other X frames are unaffected, e.g., emacsclient -c brings up a frame;
that frame is not frozen as for emacsclient -t.

The problem does not occur if I use C-space and the cursor keys to
highlight some text in the X frame instead of using the mouse.

If I have two emacsclients running (both -t) and one sets highlights a
region, the other emacsclient does not appear to freeze.

Some output from emacs-report-bug follows (the test machine isn't
configured for sending email directly, so I cut'n'pasted it to a
different machine):

In GNU Emacs 23.4.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2012-03-15 on sirius7
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
configured using `configure  '--prefix=/home/pjb/apps/emacs-23.4' 
'--with-gif=no''

Important settings:
  value of $LC_ALL: en_GB.UTF-8
  value of $LC_COLLATE: en_GB.UTF-8
  value of $LC_CTYPE: en_GB.UTF-8
  value of $LC_MESSAGES: en_GB.UTF-8
  value of $LC_MONETARY: en_GB.UTF-8
  value of $LC_NUMERIC: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Info

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
When done with this frame, type C-x 5 0
GNU Emacs 23.4.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1) of 
2012-03-15 on sirius7
When done with this frame, type C-x 5 0 [2 times]
GNU Emacs 23.4.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1) of 
2012-03-15 on sirius7
When done with this frame, type C-x 5 0
Quit
Composing main Info directory...done
Mark saved where search started
Mark set
Mark saved where search started [3 times]

Load-path shadows:
None found.

Features:
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mml-sec password-cache mm-decode mm-bodies mm-encode mailcap mail-parse
rfc2231 rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util
netrc time-date mm-util mail-prsvr gmm-utils wid-edit mailheader canlock
sha1 hex-util hashcash mail-utils emacsbug multi-isearch info easymenu
server tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd
font-setting tool-bar dnd fontset image fringe lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mldrag mouse jit-lock
font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev loaddefs button
minibuffer faces cus-face files text-properties overlay md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind font-render-setting gtk
x-toolkit x multi-tty emacs)


Cheers,

Phil.