https://github.com/python/cpython/commit/6710156bd27dd48493d15f515506a0ead5d0328f
commit: 6710156bd27dd48493d15f515506a0ead5d0328f
branch: main
author: Bénédikt Tran <[email protected]>
committer: picnixz <[email protected]>
date: 2025-10-12T12:51:44+02:00
summary:
gh-139988: fix a leak when failing to create a Union type (#139990)
files:
A
Misc/NEWS.d/next/Core_and_Builtins/2025-10-12-11-00-06.gh-issue-139988.4wi51t.rst
M Objects/unionobject.c
diff --git
a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-12-11-00-06.gh-issue-139988.4wi51t.rst
b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-12-11-00-06.gh-issue-139988.4wi51t.rst
new file mode 100644
index 00000000000000..60fa3b1d339cb1
--- /dev/null
+++
b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-12-11-00-06.gh-issue-139988.4wi51t.rst
@@ -0,0 +1,2 @@
+Fix a memory leak when failing to create a :class:`~typing.Union` type.
+Patch by Bénédikt Tran.
diff --git a/Objects/unionobject.c b/Objects/unionobject.c
index 2206ed80ef03fd..c4ece0fe09f018 100644
--- a/Objects/unionobject.c
+++ b/Objects/unionobject.c
@@ -474,11 +474,13 @@ _Py_union_from_tuple(PyObject *args)
}
if (PyTuple_CheckExact(args)) {
if (!unionbuilder_add_tuple(&ub, args)) {
+ unionbuilder_finalize(&ub);
return NULL;
}
}
else {
if (!unionbuilder_add_single(&ub, args)) {
+ unionbuilder_finalize(&ub);
return NULL;
}
}
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