Fix VM bug with try-catch inside of try-finally.

tests/language/try_finally_regress_25333_test.dart

+// Copyright (c) 2016, 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.
+
+// Test correct handling of try-catch inside try-finally.
+
+import "package:expect/expect.dart";
+
+void main() {
+  print("== test1 ==");
+  try {
+    test1();
+    print("Unexpected 1"); // should never go here
+    Expect.isTrue(false);
+  } catch (e) {
+    print("main catch 1: $e");
+    Expect.equals(e, "Ball");
+  }

[Ivan Posva, 2016/01/06 16:35:47]

Please add some state verifying that the catch clause was actually executed and
not skipped entirely.

[Florian Schneider, 2016/01/06 16:40:06]

Done.

+  print("== test2 ==");
+  try {
+    test2();
+    print("Unexpected 2"); // should never go here
+    Expect.isTrue(false);
+  } catch (e) {
+    print("main catch 2: $e");
+    Expect.equals(e, "Ball");
+  }

[Ivan Posva, 2016/01/06 16:35:47]

ditto.

[Florian Schneider, 2016/01/06 16:40:07]

Done.

+}
+
+void test1() {
+  try {
+    throw "Ball";
+  } finally {
+    try {
+      throw "Frisbee";
+    } catch(e) {
+      print("test 1 catch: $e");
+      Expect.equals(e, "Frisbee");
+    }
+  }
+}
+
+void test2() {
+  try {
+    throwError(); // call a method that throws an error
+  } finally {
+    try {
+      throw "Frisbee";
+    } catch(e) {
+      print("test 2 catch: $e");
+      Expect.equals(e, "Frisbee");
+    }
+  }
+}
+
+
+void throwError() {
+  throw "Ball";
+}