Issue #15219: Fix a reference leak when hashlib.new() is called with

invalid parameters.

Lib/test/test_hashlib.py

@@ -108,12 +108,8 @@ class HashLibTestCase(unittest.TestCase):
                                                 _algo.islower()]))
 
     def test_unknown_hash(self):
-        try:
-            hashlib.new('spam spam spam spam spam')
-        except ValueError:
-            pass
-        else:
-            self.assertTrue(0 == "hashlib didn't reject bogus hash name")
+        self.assertRaises(ValueError, hashlib.new, 'spam spam spam spam spam')
+        self.assertRaises(TypeError, hashlib.new, 1)
 
     def test_get_builtin_constructor(self):
         get_builtin_constructor = hashlib.__dict__[

Misc/NEWS

@@ -75,6 +75,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #15219: Fix a reference leak when hashlib.new() is called with
+  invalid parameters.
+
 - Issue #9559: If messages were only added, a new file is no longer
   created and renamed over the old file when flush() is called on an
   mbox, MMDF or Babyl mailbox.

Modules/_hashopenssl.c

@@ -477,6 +477,7 @@ EVP_new(PyObject *self, PyObject *args, PyObject *kwdict)
     }
 
     if (!PyArg_Parse(name_obj, "s", &name)) {
+        PyBuffer_Release(&view);
         PyErr_SetString(PyExc_TypeError, "name must be a string");
         return NULL;
     }