Could not square due to being an end point

[danieldegroot2]

Description

Empty area is created
One corner is attempted to be squared, could not square due to being an end point (i.e. also a start point)
other corners work fine.

I have not seen this message before when attempting to square corners.
Why is it not possible to square end point, exactly? (it thinks it is a line, not area?)

Screenshots

[tyrasd]

Why is it not possible to square end point, exactly?

That message is only intended for non-closed lines, where it does actually not make sense to offer the squaring operation, as there is no angle to square.

For areas, it should be allowed, though. It's probably just a case that was not implemented originally.

[tyrasd]

Oh, this was actually a bug that was introduced while fixing a related bug with the squaring operation (#10401).