Add default arg for 'owner' in function.__get__

src/runtime/types.cpp

@@ -4539,8 +4539,9 @@ void setupRuntime() {
     function_cls->giveAttrMember("__doc__", T_OBJECT, offsetof(BoxedFunction, doc), false);
     function_cls->giveAttrBorrowed("func_doc", function_cls->getattr(getStaticString("__doc__")));
     function_cls->giveAttrDescriptor("__globals__", function_globals, NULL);
-    function_cls->giveAttr("__get__",
-                           new BoxedFunction(BoxedCode::create((void*)functionGet, UNKNOWN, 3, "function.__get__")));
+    function_cls->giveAttr(
+        "__get__",
+        new BoxedFunction(BoxedCode::create((void*)functionGet, UNKNOWN, 3, "function.__get__"), { Py_None }));
     function_cls->giveAttr("__call__", new BoxedFunction(BoxedCode::create((void*)functionCall, UNKNOWN, 1, true, true,
                                                                            "function.__call__")));
     function_cls->giveAttr("__nonzero__", new BoxedFunction(BoxedCode::create((void*)functionNonzero, BOXED_BOOL, 1,

test/tests/functions.py

@@ -113,3 +113,26 @@ def f():
     pass
 """ in globals()
 assert type(globals()['f'].__globals__) == type(globals())
+
+
+
+def f(self):
+    pass
+
+class C(object):
+    pass
+
+c = C()
+
+import re
+def s(o):
+    return re.sub('0x[0-9a-f]+', '', str(o))
+
+print s(f.__get__(c))
+print s(f.__get__(c, C))
+print s(f.__get__(c, c))
+
+print f.__get__(c)()
+print f.__get__(c, C)()
+print f.__get__(c, None)()
+print f.__get__(c, c)()