RFR: JDK-8234922: No compilation error reported not reported for a binding variable when loop broken with label

[Jan Lahoda]

Hi,

Bug: https://bugs.openjdk.java.net/browse/JDK-8234922

The problem described there is basically:
---
public class PatternTest {
     public static void test(Object o) {
         A:
         do {
             break A;
         } while (!(o instanceof String v));
         System.out.println("Got: " + v);
     }
}
---

This should not compile, as "v" should not be in scope for the 
System.out.println, but javac fails to detect the break, as the break 
breaks to a labeled statement, not to the loop. The proposed patch 
solves not only this, but also break to any statement that is not inside 
the given loop.

Webrev:
http://cr.openjdk.java.net/~jlahoda/8234922/webrev.00/

How does this look?

Thanks,
     Jan