bpo-36379: __ipow__ must be a ternaryfunc, not a binaryfunc (GH-13546)
If a type's __ipow__ method was implemented in C, attempting to use
the *modulo* parameter would cause crashes.
https://bugs.python.org/issue36379
diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index 795aa78..4dd78bb 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -184,6 +184,13 @@
o @= m1
self.assertEqual(o, ("matmul", 42, m1))
+ def test_c_type_with_ipow(self):
+ # When the __ipow__ method of a type was implemented in C, using the
+ # modulo param would cause segfaults.
+ o = _testcapi.ipowType()
+ self.assertEqual(o.__ipow__(1), (1, None))
+ self.assertEqual(o.__ipow__(2, 2), (2, 2))
+
def test_return_null_without_error(self):
# Issue #23571: A function must not return NULL without setting an
# error