Fix labeled break statements.

pkg/compiler/lib/src/kernel/kernel_visitor.dart

Index: pkg/compiler/lib/src/kernel/kernel_visitor.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_visitor.dart b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
index 831eff4240e5afda8999c4e2f35331e00b99a2a0..d4d6b219d791923c3b8cfc74f8a08d5ac11a61c1 100644
--- a/pkg/compiler/lib/src/kernel/kernel_visitor.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
@@ -409,6 +409,7 @@ class KernelVisitor extends Object
       ir.LabeledStatement breakTarget = getBreakTarget(jumpTarget);
       breakTarget.body = statement;
       statement.parent = breakTarget;
+      print('a target: $statement ${statement.runtimeType}');

[sra1, 2017/01/21 00:17:18]

remove

       return breakTarget;
     } else {
       return statement;
@@ -1109,7 +1110,7 @@ class KernelVisitor extends Object
     ir.Statement body =
         buildContinueTarget(buildStatementInBlock(node.body), node, jumpTarget);
     return buildBreakTarget(
-        associateNode(new ir.WhileStatement(condition, body), node),
+        new ir.WhileStatement(condition, body),
         node,
         jumpTarget);
   }