Fix try-catch and continue in switch statements.

tests/language/switch_try_catch_test.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Regression test for issue 18869: Check that try-catch is working correctly
+// inside switch-case clauses.
+
+
+import "package:expect/expect.dart";
+
+test_switch() {
+  switch(0) {
+    _0: case 0:
+      print("_0");
+      continue _5;
+    _1: case 1:
+      try {
+        print("bunny");
+        continue _6;
+      } catch(e) { }
+      break;
+    _5: case 5:
+      print("_5");
+      continue _6;
+    _6: case 6:
+      print("_6");
+     throw 555;
+  }
+}
+
+main() {
+  Expect.throws(() => test_switch(), (e) => e == 555);
+}