P: Reproducible way to crash

I can make Lightroom 5.7.1 on WIndows 7 (64bit) crash in a repeatable way; I even have a video demonstrating it:
In the development module go to the manual lens corrections. The press the left mouse button on the numeric field to rotate the image. While holding the left button, press the right button (by mistake). A dialog pops up that you can cancel with ESC. Then there's a numeric input in the field, and it still has input focus. Press ESC to cancel the focus. Now try to undo the partial rotation (because your're a perfectionist) by pressing Ctrl+Z. A short pause, the Lightroom is dead.
It happened to me a few times (in 5.7.0 also), so I made a video (WMV, 2MB).