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bug#14850: 24.3; GDI Handles leak(Windows)

From: Akihiro KAYAMA
Subject: bug#14850: 24.3; GDI Handles leak(Windows)
Date: Fri, 12 Jul 2013 18:49:48 +0900

This bug report will be sent to the Bug-GNU-Emacs mailing list
and the GNU bug tracker at debbugs.gnu.org.  Please check that
the From: line contains a valid email address.  After a delay of up
to one day, you should receive an acknowledgment at that address.

Please write in English if possible, as the Emacs maintainers
usually do not have translators for other languages.

Please describe exactly what actions triggered the bug, and
the precise symptoms of the bug.  If you can, give a recipe
starting from `emacs -Q':

When using multiple emacs frames and shell buffer in Windows,
Emacs process's GDI Handles increase constantly.

How to reproduce:

 - emacs.exe -Q
 - M-x make-frame-command
 - M-x shell
 - ping -t (continuous shell output)
 - M-x find-file (open some mini buffer)
 - inspect Emacs process's GDI Handles by Process Explorer(www.sysinternals.com)

As the increasing ratio is in proportion to number of frames, with a
dozen frames Emacs process can easily reach Windows OS limit(=10000 handles)
in a few minutes.

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'.
For information about debugging Emacs, please read the file
c:/Program Files (x86)/emacs-24.3/etc/DEBUG.

In GNU Emacs 24.3.1 (i386-mingw-nt6.1.7601)
 of 2013-03-18 on MARVIN
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --with-gcc (4.7) --cflags

Important settings:
  value of $LANG: JPN
  locale-coding-system: cp932
  default enable-multibyte-characters: t

Major mode: Shell

Minor modes in effect:
  shell-dirtrack-mode: t
  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-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
ESC x m a k e - f r <tab> - <tab> c o <tab> RET <switch-frame>
ESC x s h e l l RET p i n g SPC 1 2 7 . 0 . 0 . 1 SPC
- t RET ESC x f i n d - f i l e RET <down-mouse-1>
<mouse-movement> <mouse-1> C-g ESC x C-g C-g C-n C-n
ESC x r e p o r t - e m <tab> RET

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...
You can run the command `make-frame-command' with C-x 5 2
completing-read-default: Command attempted to use minibuffer while in minibuffer
Quit [2 times]

Load-path shadows:
None found.

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