Should be an error for named arguments in missing functions

[andrew-skybound]

Named arguments are not allowed in missing functions and an error should be raised. This includes functions invoked via call() when the function is not found.

Test Case 1:

p {
    color: missing($a: b);
}

Ruby SASS Output:

/* Error: Function missing doesn't support keyword arguments ...

Libsass Output:

p {
  color: missing($a: b);
}

Test Case 2:

p {
    color: call(missing, $a: b);
}

Ruby SASS Output:

/* Error: Function missing doesn't support keyword arguments ...

Libsass Output:

p {
  color: missing(b);
}

[xzyfer]

Spec added sass/sass-spec#463

[saper]

A dynamic test from sass/sass-spec#463 shows this:

foo {
    color: call(missing, $a: b);
}

Output:

foo {
  color: missing(b); }

[xzyfer]

Looks like the original patch never fixed the dynamic case.