Repeater patterns can drop leftover tokens within delims instead of failing the rule

Created by: natefaubion

macro sum {
  rule { ($num:lit ...) } => {
    $num (+) ...
  }
}

sum(1 2 3 four)

1 + 2 + 3;

The rule in sum should fail since there are leftover tokens in the parens, but it is dropping them instead. There appears to be code in matchPatterns that is supposed to handle this, but it doesn't look like it's working. I went all the way back to v0.3.0 and it was broken there too.