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..348103eb48285faecc7f370d4f45d9a0f362c01d 100644
--- a/pkg/compiler/lib/src/kernel/kernel_visitor.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
@@ -1109,7 +1109,7 @@ 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);
   }