[metapost] independent variables overflow

[Werner LEMBERG]

> Both mp and mf have this overflow, and it is a caused by a known
> limitation

Hmm, `known' limitation...  I couldn't find a description of it.

> `independent variable' in this case is not a variable name, it is
> any variable value that is used in an equation. (in the example,
> each loop iteration generates 4 of those: the coordinate values 1,
> 0, 1, and 1)

I've suspected that, but my brain simply refused to think of the
value 1 as a `variable value'...

> There is no fix (or even workaround) right now, but this problem is on
> the todo list for the next release.

Excellent.

Thanks for the explanations.


    Werner