gh-147998: Fix possible memory leak in _pop_preserved (crossinterp.c) (GH-147999)

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-04-02-13-25-09.gh-issue-147998.wnzkRT.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-04-02-13-25-09.gh-issue-147998.wnzkRT.rst
new file mode 100644 (file)
index 0000000..e83d992
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-04-02-13-25-09.gh-issue-147998.wnzkRT.rst
@@ -0,0 +1,3 @@
+Fixed a memory leak in interpreter helper calls so cleanup works when an
+operation falls across interpreter boundaries. Patch by Maurycy
+Pawłowski-Wieroński.

diff --git a/Python/crossinterp.c b/Python/crossinterp.c
index 4cd4b32ef906bb3de95ab63b32e945537d654f32..6b489bf03f86ecdbbd70d1f5f3a37c7773452e0c 100644 (file)
--- a/Python/crossinterp.c
+++ b/Python/crossinterp.c
@@ -3006,7 +3006,7 @@ _pop_preserved(_PyXI_session *session,
         *p_xidata = NULL;
     }
     else {
-        _PyXI_namespace *xidata = _create_sharedns(session->_preserved);
+        xidata = _create_sharedns(session->_preserved);
         if (xidata == NULL) {
             failure.code = _PyXI_ERR_PRESERVE_FAILURE;
             goto error;