support type(name, bases, dict) where dict has non str keys

src/runtime/objmodel.cpp

@@ -5977,13 +5977,23 @@ Box* _typeNew(BoxedClass* metatype, BoxedString* name, BoxedTuple* bases, BoxedD
         made->setattr(dict_str, dict_descr, NULL);
     }
 
+    bool are_all_dict_keys_strs = true;
     for (const auto& p : *attr_dict) {
-        auto k = coerceUnicodeToStr<CXX>(p.first);
-
-        RELEASE_ASSERT(k->cls == str_cls, "%s", k->cls->tp_name);
-        BoxedString* s = static_cast<BoxedString*>(k);
-        internStringMortalInplace(s);
-        made->setattr(s, p.second, NULL);
+        if (p.first->cls != str_cls) {
+            are_all_dict_keys_strs = false;
+            break;
+        }
+    }
+    if (are_all_dict_keys_strs) {
+        for (const auto& p : *attr_dict) {
+            BoxedString* s = static_cast<BoxedString*>(p.first);
+            internStringMortalInplace(s);
+            made->setattr(s, p.second, NULL);
+        }
+    } else {
+        Box* copy = PyDict_Copy(attr_dict);
+        RELEASE_ASSERT(copy, "");
+        made->setDictBacked(copy);
     }
 
     static BoxedString* module_str = internStringImmortal("__module__");

test/tests/metaclasses.py

@@ -57,3 +57,9 @@ print D.__base__
 
 print type("test", (), {})
 print type("test", (), {"__module__":"fake"})
+
+# test non str attr keys
+t = type("test", (), {u"test" : 2, 1000L : 3, 1.0 : 4})
+print t.__dict__[u"test"], t.test
+print t.__dict__[1000L]
+print t.__dict__[1.0]