Just modify materials-cpp example a little - hide or show Chest Entity every second (by set its parent to NULL or SceneRoot entity). After some time crash out with:

No shader program found for DNA
ASSERT: "m_activeShader" in file src/render/graphicshelpers/graphicscontext.cpp, line 1039
Invalid parameter passed to C runtime function.

I use qt 3d 5.7 (c3fdb888fbd94de0f6b7b1a6859cba8132ecc93d) with those 4 not yet merged commits (to be able to run applications on android)

1. https://codereview.qt-project.org/#/c/164993/2
2. https://codereview.qt-project.org/#/c/164994/2
3. https://codereview.qt-project.org/#/c/164995/2
4. https://codereview.qt-project.org/#/c/164996/