Comment 9 for bug 983942

You can wait for 5.12 to be released really soon, alternatively you can change the configuration options of unity-2d not to use sticky edges (you can change this from the control panel but since you probably can get there look for it in dconf-editor com.canonical.unity2d) nor autohiding launcher (you can change this from the control panel but since you probably can get there look for it in dconf-editor com.canonical.unity2d.launcher), that should make pointer barriers not needed and workaround the crash.