Comment 22 for bug 1618590

Unfortunately upstream won't be merging the third patch to 5.6 series, so it's only in Qt 5.8. It hides the problem instead of fixing the problem, which is that there is a plugin that doesn't unregister its objects before unloading.

I've prepared another silo https://bileto.ubuntu.com/#/ticket/2015 with alternative third patch that _is_ being considered for 5.6: https://codereview.qt-project.org/#/c/172173/

Let's test it and if it fixes the problem too, land that one instead.