Don't evaluate the argument twice for unresolved static setter calls.

tests/language/regress_13494_test.dart

Index: tests/language/regress_13494_test.dart
diff --git a/tests/language/factory_return_type_checked_test.dart b/tests/language/regress_13494_test.dart
similarity index 50%
copy from tests/language/factory_return_type_checked_test.dart
copy to tests/language/regress_13494_test.dart
index dc46145d5e7565a4aec1661a61914b4ebcf8f54d..aaf975abe7921fe6f9af69740d9a0e8933ef4338 100644
--- a/tests/language/factory_return_type_checked_test.dart
+++ b/tests/language/regress_13494_test.dart
@@ -2,22 +2,24 @@
 // 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 dart2js. Test that the argument to an unresolved static
+// getter is only evaluated once.
+
 import "package:expect/expect.dart";
 
-class A {
-  factory A() => 42;
-}
+int i = 0;
+
+p(x) => i++;
+
+class A {}
 
 main() {
-  bool isCheckedMode = false;
+  bool caught = false;
   try {
-    String a = 42;
-  } catch (e) {
-    isCheckedMode = true;
-  }
-  if (isCheckedMode) {
-    Expect.throws(() => new A(), (e) => e is TypeError);
-  } else {
-    Expect.equals(42, new A());
+    A.unknown = p(2);
+  } catch (_) {
+    caught = true;
   }
+  Expect.isTrue(caught);
+  Expect.equals(1, i);
 }