segmentation fault in gazebo

edit

I use ubuntu 14.04, ros indigo, verion 1.11.9.

I run this command:

roslaunch turtlebot_gazebo turtlebot_world.launch

Sometimes I have a segmentation fault (core dumped). Then I try to rerun the command. It can work as usual or fail again. Usually after three or four rerun it works correctly. You can see the error below (or on the picture 2.png). I have no idea how to repeat this bug, but it appears quite often. Do you have any ideas how can I fix this problem?

I’ve seen some questions about segmentation fault but there was no answer which can help.

[ INFO] [1451979222.241382211, 0.190000000]: Kobuki(ns = //): Advertise Bumper[mobile_base/events/bumper]!
[ INFO] [1451979222.246247047, 0.190000000]: Kobuki(ns = //): Advertise IMU[mobile_base/sensors/imu_data]!
[ INFO] [1451979222.246448570, 0.190000000]: GazeboRosKobuki plugin ready to go! [mobile_base] [spawn_turtlebot_model-4] process has finished cleanly
log file: /home/nadya/.ros/log/a2c15d8e-b37e-11e5-aa96-c485088c759e/spawn_turtlebot_model-4*.log
Segmentation fault (core dumped)
[gazebo_gui-3] process has died [pid 11524, exit code 139, cmd /opt/ros/indigo/lib/gazebo_ros/gzclient __name:=gazebo_gui __log:=/home/nadya/.ros/log/a2c15d8e-b37e-11e5-aa96-c485088c759e/gazebo_gui-3.log]. log file: /home/nadya/.ros/log/a2c15d8e-b37e-11e5-aa96-c485088c759e/gazebo_gui-3*.log