System information

SolveSpace version: 3.0~d8f5a8da

Operating system: Fedora 32

Expected behavior

Make a sketch with 2 rectangles with one point coincident. Extrude. Analyze->Show Naked Edges

There should be no naked edges.

Actual behavior

The coincident edges are shown red and there are 4 naked edges found.

Additional information

You get similar behaviour even if the 2 extrusions are from different sketches as shown here

This is similar to the second problem reported in issue #303. It is also loosely related to issue #171.