mix sonar and laser in model sdf

Hi! I am editing a model that has both lasers and sonar. The model below work fine, but if I uncomment the sonar part gazebo crashes with no error thrown in verbose mode. I am working on gazebo-6.5. If I remove others sensors to keep just a sonar, it is working fine (even if the visual is not updated, the msg is). I don't know what I am missing. false0 0 0.3596 0 -0 00.00220451 0 -0.185729 0 -0 011.6015.1 .1 .7.1 .1 .71401151-0.360.360.370.010.0562 0 -0.303 0 -0.0175 01401151-0.360.360.370.01-0.018 0.0899 -0.303 5.20497e-18 -0.0175 1.757281401151-0.360.360.370.01-0.018 -0.0899 -0.303 -5.20497e-18 -0.0175 -1.75728 //edit : The problem seems to not happen everytime, it looks like I need to upload several time before the behaviour hapens. When I launch separately gzclient and gzserver then I get the msg "zsh: segmentation fault (core dumped) gzserver --verbose". Plus the few times of when gazebo doesn't segfault, the sonar data range is not updated if an obstacle is in front.