Bug#575852: Xserver crash on too big popup message

["Fedor P. Goncharov" <fedor@mcb.nsc.ru>]

Hi Cyril,
Bug still present on this configuration:

libgl1-mesa-dri 7.10-4

Versions of packages libgl1-mesa-dri depends on:
ii  libc6                         2.11.2-11  Embedded GNU C Library: 
Shared lib
ii  libdrm-intel1                 2.4.23-3   Userspace interface to 
intel-speci
ii  libdrm-radeon1                2.4.23-3   Userspace interface to 
radeon-spec
ii  libdrm2                       2.4.23-3   Userspace interface to 
kernel DRM
ii  libexpat1                     2.0.1-7    XML parsing C library - 
runtime li
ii  libgcc1                       1:4.5.2-4  GCC support library
ii  libstdc++6                    4.5.2-4    The GNU Standard C++ Library v3
ii  libtalloc2                    2.0.5-1    hierarchical pool based 
memory all

libgl1-mesa-dri recommends no packages.

Versions of packages libgl1-mesa-dri suggests:
pn  libglide3                     <none>     (no description available)

Versions of packages xserver-xorg depends on:
ii  libc6                     2.11.2-11      Embedded GNU C Library: 
Shared lib
ii  x11-xkb-utils             7.6+2          X11 XKB utilities
ii  xkb-data                  1.8-2          X Keyboard Extension (XKB) 
configu
ii  xserver-xorg-core         2:1.9.4-3      Xorg X server - core server
ii  xserver-xorg-input-evdev  1:2.6.0-2      X.Org X server -- evdev 
input driv
ii  xserver-xorg-input-mouse  1:1.6.99.901-1 X.Org X server -- mouse 
input driv
ii  xserver-xorg-input-synapt 1.3.99.901-1   Synaptics TouchPad driver 
for X.Or
ii  xserver-xorg-video-radeon 1:6.14.0-1     X.Org X server -- AMD/ATI 
Radeon d

Versions of packages xserver-xorg-core depends on:
ii  keyboard-configuration    1.68           system-wide keyboard 
preferences
ii  libaudit0                 1.7.13-1+b2    Dynamic library for 
security audit
ii  libc6                     2.11.2-11      Embedded GNU C Library: 
Shared lib
ii  libdrm2                   2.4.23-3       Userspace interface to 
kernel DRM
ii  libgcrypt11               1.4.6-5        LGPL Crypto library - 
runtime libr
ii  libpciaccess0             0.12.1-1       Generic PCI access library 
for X
ii  libpixman-1-0             0.21.4-2       pixel-manipulation library 
for X a
ii  libselinux1               2.0.96-1       SELinux runtime shared 
libraries
ii  libudev0                  166-1          libudev shared library
ii  libxau6                   1:1.0.6-1      X11 authorisation library
ii  libxdmcp6                 1:1.1.0-1      X11 Display Manager Control 
Protoc
ii  libxfont1                 1:1.4.3-2      X11 font rasterisation library
ii  udev                      166-1          /dev/ and hotplug 
management daemo
ii  xserver-common            2:1.9.99.902-2 common files used by 
various X ser

F.