Repro Steps:

A) TO INVOKE AN UNSUCCESSFUL PATHFIGURE DELETION

1) Create a Page
2) Introduce a 512x256 Rectangle to the RootGrid of the Page, then convert it to a Path.
3) Click on the Path created in Step 2), and equip the Path Tool (P). (This will ensure that the PathFigure drawn in Step 4) and 5) is a PathFigure, and not a new Path)
4) Zoom in to a level below 2500% (eg: 2278% or 1720%), and place a first point. This bug is easier to repro if you purposefully try to place the point in between two lines of the Pixel Grid.
5) Staying at the same Zoom level, place a second Path Point directly below the first, to make up a vertical Segment.

6) After the second Point is placed in Step 4), without de-selecting the Path, switch to the Path Selection Tool (A), hold [Ctrl] and select both Points of the Path Created.
7) Press [Del] to delete the PathFigure.

Observe how the deletion only deletes the initial Path Point, and not the second Point placed, which remains on-Stage.

Expected results: Pressing [Del] when two Path Points are selected, deletes both PathPoints.

B) TO INVOKE A CRASH

1) Create a Page
2) Introduce a 512x256 Rectangle to the RootGrid of the Page, then convert it to a Path.
3) Click on the Path created in Step 2), and equip the Path Tool (P). (This will ensure that the PathFigure drawn in Step 4) and 5) is a PathFigure, and not a new Path)
4) Zoom in to a level below 2500% (eg: 2278% or 1720%), and place a first point. This bug is easier to repro if you purposefully try to place the point in between two lines of the Pixel Grid.
5) Staying at the same Zoom level, place a second Path Point directly below the first, to make up a vertical Segment.

6) Deselect the Path by clicking on the RootGrid of the Page, then select the Path again.
7) Using the Path Selection Tool (A), hold [Ctrl], and select both PathPoints of the PathFigure created in Step 4) and 5).
8) Press [Del] to delete the PathFigure.

Observe the application crashing.

Expected Results: Deleting a Path Figure does not cause Studio to Crash.