Huh. What is wrong with this object?

I started to model a pair of pants. However, when I decided to unwrap it before I continued with the back, I ended up with a really weird issue.

If I look at the transforms, I have this unexplained transform showing - blender transform -1.#IND

Plus I can’t unwrap it correctly.

Here’s what i did. I just started with a plane. Converted to one vertex. Outlined the object (pants) and did some grid fills.

How can I fix it?

Tried removing doubles. Tried selecting vertices and invert selection delete and everything goes?

Using 2.79 Blender.

pants.blend (519 KB)

Well started over again and everything is OK now. Don’t know why this happened, but if anyone does know, I would appreciate also knowing so I don’t do it again.