Yep, http://pastebin.com/hGCSFqqj Xwayland is still running by the time of lipstick's crash.
#2 QtWayland::ShellSurface::shell_surface_pong (this=0x1df2088, resource=<optimized out>, serial=<error reading variable: Cannot access memory at address 0xffffffe7>) at wayland_wrapper/qwlshellsurface.cpp:285
void ShellSurface::shell_surface_set_fullscreen(Resource *resource, uint32_t method, uint32_t framerate, struct wl_resource *output) { Q_UNUSED(resource); Q_UNUSED(method); Q_UNUSED(framerate); Q_UNUSED(output); QSize defaultScreenSize = m_surface->compositor()->outputGeometry().size(); send_configure(resize_bottom_right, defaultScreenSize.width(), defaultScreenSize.height()); if (m_surface->extendedSurface()) m_surface->extendedSurface()->setVisibility(QWindow::FullScreen, false); }