Re: undiagnosed pic error

[Douglas McIlroy]

The fact that you can't apply "fill" to a polygon drawn with pic's
"line" command is a minor symptom of a general phenomenon. Pic accepts
any modifier attached to any command that admits some modifier, and
simply ignores those that don't make sense. A couple of examples:
        box rad 1
        box with .e at last box .w with .w at last box .e