8162874: AST nodes representing operators should have a common superclass Reviewed-by: mcimadamore

8144733: Iterating over elements of a Scope can return spurious inner class elements Summary: When a Symbol is removed from a Scope while iterating over it, update the iterator as well to reflect the change. Reviewed-by: mcimadamore

Merge

8157100: missing dependency in build system Reviewed-by: tbell