[Python-checkins] [3.12] gh-106917: fix super classmethod calls to non-classmethods (GH-106977). (#107204)

[carljm]

https://github.com/python/cpython/commit/5fd028b677ae1dd20a60fc2f43d4380b809d70f0
commit: 5fd028b677ae1dd20a60fc2f43d4380b809d70f0
branch: 3.12
author: Carl Meyer <carl at oddbird.net>
committer: carljm <carl at oddbird.net>
date: 2023-07-24T21:13:17Z
summary:

[3.12] gh-106917: fix super classmethod calls to non-classmethods (GH-106977). (#107204)

(cherry picked from commit e5d5522612e03af3941db1d270bf6caebf330b8a)

files:
A Misc/NEWS.d/next/Core and Builtins/2023-07-21-14-37-48.gh-issue-106917.1jWp_m.rst
M Lib/test/test_super.py
M Python/bytecodes.c
M Python/generated_cases.c.h

diff --git a/Lib/test/test_super.py b/Lib/test/test_super.py
index 664cf70b3cf0f..43162c540b55a 100644
--- a/Lib/test/test_super.py
+++ b/Lib/test/test_super.py
@@ -5,6 +5,9 @@
 from test import shadowed_super
 
 
+ADAPTIVE_WARMUP_DELAY = 2
+
+
 class A:
     def f(self):
         return 'A'
@@ -419,8 +422,47 @@ def test(name):
             super(MyType, type(mytype)).__setattr__(mytype, "bar", 1)
             self.assertEqual(mytype.bar, 1)
 
-        test("foo1")
-        test("foo2")
+        for _ in range(ADAPTIVE_WARMUP_DELAY):
+            test("foo1")
+
+    def test_reassigned_new(self):
+        class A:
+            def __new__(cls):
+                pass
+
+            def __init_subclass__(cls):
+                if "__new__" not in cls.__dict__:
+                    cls.__new__ = cls.__new__
+
+        class B(A):
+            pass
+
+        class C(B):
+            def __new__(cls):
+                return super().__new__(cls)
+
+        for _ in range(ADAPTIVE_WARMUP_DELAY):
+            C()
+
+    def test_mixed_staticmethod_hierarchy(self):
+        # This test is just a desugared version of `test_reassigned_new`
+        class A:
+            @staticmethod
+            def some(cls, *args, **kwargs):
+                self.assertFalse(args)
+                self.assertFalse(kwargs)
+
+        class B(A):
+            def some(cls, *args, **kwargs):
+                return super().some(cls, *args, **kwargs)
+
+        class C(B):
+            @staticmethod
+            def some(cls):
+                return super().some(cls)
+
+        for _ in range(ADAPTIVE_WARMUP_DELAY):
+            C.some(C)
 
 
 if __name__ == "__main__":
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-07-21-14-37-48.gh-issue-106917.1jWp_m.rst b/Misc/NEWS.d/next/Core and Builtins/2023-07-21-14-37-48.gh-issue-106917.1jWp_m.rst
new file mode 100644
index 0000000000000..82c74d5465458
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2023-07-21-14-37-48.gh-issue-106917.1jWp_m.rst	
@@ -0,0 +1,4 @@
+Fix classmethod-style :func:`super` method calls (i.e., where the second
+argument to :func:`super`, or the implied second argument drawn from
+``self/cls`` in the case of zero-arg super, is a type) when the target of
+the call is not a classmethod.
diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index 0baf2451ee4f8..b914afa07fba4 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -1663,7 +1663,7 @@ dummy_func(
             PyTypeObject *cls = (PyTypeObject *)class;
             int method_found = 0;
             res2 = _PySuper_Lookup(cls, self, name,
-                                   cls->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
+                                   Py_TYPE(self)->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
             Py_DECREF(global_super);
             Py_DECREF(class);
             if (res2 == NULL) {
diff --git a/Python/generated_cases.c.h b/Python/generated_cases.c.h
index 103373ec0db01..281c8b5e5245b 100644
--- a/Python/generated_cases.c.h
+++ b/Python/generated_cases.c.h
@@ -2411,7 +2411,7 @@
             PyTypeObject *cls = (PyTypeObject *)class;
             int method_found = 0;
             res2 = _PySuper_Lookup(cls, self, name,
-                                   cls->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
+                                   Py_TYPE(self)->tp_getattro == PyObject_GenericGetAttr ? &method_found : NULL);
             Py_DECREF(global_super);
             Py_DECREF(class);
             if (res2 == NULL) {