kwin_x11 segmentation faults on certain circumstances

I have reported this bug on https://bugs.kde.org/show_bug.cgi?id=381429 and they replied that it’s because of ‘Crashes in proprietary NVIDIA driver’. I no longer know what to think…
kwin_x11-20170619-103738.kcrash.txt (11.8 KB)

It’s also worth mentioning those ones: https://bugs.kde.org/show_bug.cgi?id=382485 https://bugs.kde.org/show_bug.cgi?id=381767 https://bugs.kde.org/show_bug.cgi?id=381834 https://bugs.kde.org/show_bug.cgi?id=381870

Basically, to have Kwin crash free experience I had to disable tearing prevention. Though, Plasmashell still crashes randomly under a heavy GPU load (OpenGL game). NVIDIA, please…