If Color constructor is passed a value > 0xFFFFFFFF, Sky crashes

sky/tests/raw/color_bounds.dart

+import 'dart:sky' as sky;
+
+import '../resources/third_party/unittest/unittest.dart';
+import '../resources/unit.dart';
+
+void main() {
+  initUnit();
+
+  test("paint set to black", () {
+    sky.Color c = new sky.Color(0x00000000);
+    sky.Paint p = new sky.Paint();
+    p.color = c;
+    expect(c.toString(), equals('Color(0x00000000)'));
+  });
+
+  test("color created with out of bounds value", () {
+    try {
+      sky.Color c = new sky.Color(0x100 << 24);
+      sky.Paint p = new sky.Paint();
+      p.color = c;
+    } catch (e) {
+      expect(e != null, equals(true));
+    }
+  });
+
+  test("color created with wildly out of bounds value", () {
+    try {
+      sky.Color c = new sky.Color(1 << 1000000);
+      sky.Paint p = new sky.Paint();
+      p.color = c;
+    } catch (e) {
+      expect(e != null, equals(true));
+    }
+  });
+}