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bpo-44646: Fix the hash of the union type. (GH-27179) (#27180)

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It no longer depends on the order of arguments.
hash(int | str) == hash(str | int)

Co-authored-by: Jack DeVries <58614260+jdevries3133@users.noreply.github.com>
(cherry picked from commit aeaa553d65)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2021-07-16 02:02:59 -07:00 • committed by GitHub
parent 6aa59c68dc
commit 705988056e
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3 changed files with 12 additions and 4 deletions
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10
Objects/unionobject.c
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@ -33,11 +33,13 @@ static Py_hash_t
union_hash(PyObject *self)
{
unionobject *alias = (unionobject *)self;
Py_hash_t h1 = PyObject_Hash(alias->args);
if (h1 == -1) {
return -1;
PyObject *args = PyFrozenSet_New(alias->args);
if (args == NULL) {
return (Py_hash_t)-1;
}
return h1;
Py_hash_t hash = PyObject_Hash(args);
Py_DECREF(args);
return hash;
}
static int