Tested on Ubuntu 16.04.4 LTS, 64bits, gcc 5.4.0
Qt library from online installer

Example crashes.

Singal Received:
Signal name: SIGSEGV
Signal meaninging: Segmentation fault

1 QtWebEngineCore::RenderWidgetHostViewQtDelegateQuick::createLayer render_widget_host_view_qt_delegate_quick.cpp 157 0x7ffff7ba76d4
2 QtWebEngineCore::DelegatedFrameNode::commit delegated_frame_node.cpp 670 0x7fffee720fd5
3 QtWebEngineCore::Compositor::updatePaintNode compositor.cpp 134 0x7fffee7122ed
4 QQuickWindowPrivate::updateDirtyNode qquickwindow.cpp 3532 0x7fffeda25470
5 QQuickWindowPrivate::updateDirtyNodes qquickwindow.cpp 3277 0x7fffeda25aad
6 QQuickWindowPrivate::syncSceneGraph qquickwindow.cpp 437 0x7fffeda26c52
7 QSGRenderThread::sync qsgthreadedrenderloop.cpp 563 0x7fffed9d422c
8 QSGRenderThread::syncAndRender qsgthreadedrenderloop.cpp 610 0x7fffed9d55c0
9 QSGRenderThread::run qsgthreadedrenderloop.cpp 730 0x7fffed9d877c
10 QThreadPrivate::start qthread_unix.cpp 360 0x7ffff6570113
11 start_thread pthread_create.c 463 0x7fffec5466db
12 clone clone.S 95 0x7ffff5c5688f