8019480: Javac crashes when method is called on a type-variable receiver from lambda expression
Summary: Logic for shortcircuiting speculative attribution doesn't handle type-variable receivers
Reviewed-by: jjg, vromero
8017618: NullPointerException in RichDiagnosticFormatter for bad input program
Summary: RDF crashes when diagnostic contains type 'void'
Reviewed-by: jjg, vromero