Don't choke on dev transformers from path deps.

test/transformer/gets_and_upgrades_a_package_with_a_dev_transformer_test.dart

Index: test/transformer/gets_and_upgrades_a_package_with_a_dev_transformer_test.dart
diff --git a/test/transformer/gets_and_upgrades_a_package_with_a_dev_transformer_test.dart b/test/transformer/gets_and_upgrades_a_package_with_a_dev_transformer_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c47a226ecb2f656f70e4d2644decdc88fd36e21c
--- /dev/null
+++ b/test/transformer/gets_and_upgrades_a_package_with_a_dev_transformer_test.dart
@@ -0,0 +1,32 @@
+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS d.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 'package:scheduled_test/scheduled_test.dart';
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+import '../serve/utils.dart';
+
+// Regression test for #1369.
+main() {
+  integration("gets and upgrades a package with a dev transformer", () {
+    servePackages((builder) {
+      builder.serveRealPackage('barback');
+
+      builder.serve('foo', '1.0.0', pubspec: {
+        'transformers': [
+          {'bar': {r'$include': 'test/**'}}
+        ],
+        'dev_dependencies': {
+          'bar': {'path': '../bar'}
+        }
+      });
+    });
+
+    d.appDir({'foo': '1.0.0'}).create();
+
+    // Check for the error message because pub didn't consider this error fatal.
+    pubGet(error: isEmpty, exitCode: 0);
+  });
+}