`Cannot invoke "org.w3c.css.values.CssValue.getType()" because "val" is null.`

[boris-petrov]

This code:

polygon {
  fill: rgb(var(--color-rgb, '0,0,0'), 0.3);
}

Leads to: CSS: “fill”: Cannot invoke "org.w3c.css.values.CssValue.getType()" because "val" is null..

Similarly to #516, this started happening after the changes from the last few days. Before that, again there was an error on that same line, but a different one: CSS: “fill”: “var(--color-rgb, "0,0,0")” is not a valid color 3 or 6 hexadecimals numbers.. For that one there was a bug report.

[ylafon]

Thanks again for the report, var() handling has lots of nasty corner cases, pretty sure there are some others.