Fix 15413: setRange for views with overlapping buffers.

tests/lib/typed_data/setRange_4_test.dart

Index: tests/lib/typed_data/setRange_4_test.dart
===================================================================
--- tests/lib/typed_data/setRange_4_test.dart	(revision 0)
+++ tests/lib/typed_data/setRange_4_test.dart	(working copy)
@@ -0,0 +1,22 @@
+// 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.
+
+import 'setRange_lib.dart';
+import 'package:expect/expect.dart';
+import 'dart:typed_data';
+
+clampingTest() {
+  var a1 = new Int8List(8);
+  var a2 = new Uint8ClampedList.view(a1);
+  initialize(a1);
+  Expect.equals('[1, 2, 3, 4, 5, 6, 7, 8]', '$a1');
+  Expect.equals('[1, 2, 3, 4, 5, 6, 7, 8]', '$a2');
+  a1[0] = -1;
+  a2.setRange(0, 2, a1);
+  Expect.equals('[0, 2, 3, 4, 5, 6, 7, 8]', '$a2');
+}
+
+main() {
+  clampingTest();
+}