super: don't assert on nonexisting attributes

src/runtime/super.cpp

@@ -127,10 +127,10 @@ Box* superGetattribute(Box* _s, Box* _attr) {
         }
     }
 
-    Box* r = typeLookup(s->cls, attr);
-    // TODO implement this
-    RELEASE_ASSERT(r, "should call the equivalent of objectGetattr here");
-    return processDescriptor(r, s, s->cls);
+    Box* rtn = PyObject_GenericGetAttr(s, attr);
+    if (!rtn)
+        throwCAPIException();
+    return rtn;
 }
 
 Box* super_getattro(Box* _s, Box* _attr) noexcept {

test/tests/super.py

@@ -19,6 +19,11 @@ class C(B):
     def f(self):
         print "C.f()"
         super(C, self).f()
+        print super(C, self).__thisclass__
+        try:
+            super(C, self).does_not_exist
+        except AttributeError as e:
+            print e
 
 c = C(1, 2)
 print c.arg1