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[3.14] gh-139988: fix a leak when failing to create a Union type (GH-139990) (#139993)

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gh-139988: fix a leak when failing to create a Union type (GH-139990)
(cherry picked from commit 6710156bd2)

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
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Miss Islington (bot) 2025-10-12 13:16:43 +02:00 • committed by GitHub
parent ae91b4bcd0
commit 3b9694a8e6
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Misc/NEWS.d/next/Core_and_Builtins/2025-10-12-11-00-06.gh-issue-139988.4wi51t.rst Normal file
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@ -0,0 +1,2 @@
Fix a memory leak when failing to create a :class:`~typing.Union` type.
Patch by Bénédikt Tran.

2
Objects/unionobject.c
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@ -474,11 +474,13 @@ _Py_union_from_tuple(PyObject *args)
} }
if (PyTuple_CheckExact(args)) { if (PyTuple_CheckExact(args)) {
if (!unionbuilder_add_tuple(&ub, args)) { if (!unionbuilder_add_tuple(&ub, args)) {
unionbuilder_finalize(&ub);
return NULL; return NULL;
} }
} }
else { else {
if (!unionbuilder_add_single(&ub, args)) { if (!unionbuilder_add_single(&ub, args)) {
unionbuilder_finalize(&ub);
return NULL; return NULL;
} }
} }