($a, $b?, $c) should be a compile error

[schwern]

The docs say...

   * If one positional param is optional, everything to the right must be
   optional

       method foo($a, $b?, $c?)  # legal

       method bar($a, $b?, $c)   # illegal, ambiguous

   Does "->bar(1,2)" mean $a = 1 and $b = 2 or $a = 1, $c = 3?

But method bar($a, $b?, $c) {} does not cause a compile time error.

[barefootcoder]

Fixed by pull request #110.