[Groff] Weird behavior of pic with colors

[Bob Diertens]

Hi,

Consider

\m[red]
.PS
arrow
.PE

The arrowhead is filled in with black.

Looking at the ouput of pic, the arrowhead is filled with a \D'P ...'
but the shading is set with a \D'f 1000'.
Adding a \M[red] does not work, but

    arrow outline "red"

does (shaded "red" not).

It seems to me that the arrowhead must be filled with the same color
as the rest of the arrow. So instead of a \D'f ...' a
\M[current glyph color] and \M[] must be used around the \D'P ...'.
But there is no request for the current glyph color available.

Any thoughts?

Gr,
    Bob