[3.13] gh-140301: Fix memory leak in subinterpreter PyConfig cleanup (GH-140303)

ashm-dev · kumaraditya303 · ashm-dev · commit 6adce9a8ac83 · 2025-10-27T22:13:56.000+03:00
(cherry picked from commit a615fb4) Co-authored-by: Shamil <ashm.tech@proton.me> Co-authored-by: Kumar Aditya <kumaraditya@python.org>
diff --git a/Misc/NEWS.d/next/Core and Builtins/2025-10-18-18-08-36.gh-issue-140301.m-2HxC.rst b/Misc/NEWS.d/next/Core and Builtins/2025-10-18-18-08-36.gh-issue-140301.m-2HxC.rst
@@ -0,0 +1 @@
+Fix memory leak of ``PyConfig`` in subinterpreters.
diff --git a/Python/pystate.c b/Python/pystate.c
@@ -985,6 +985,8 @@ PyInterpreterState_Delete(PyInterpreterState *interp)
 
     _PyObject_FiniState(interp);
 
+    PyConfig_Clear(&interp->config);
+
     free_interpreter(interp);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix memory leak of ``PyConfig`` in subinterpreters.
Original file line number	Diff line number	Diff line change
`@@ -985,6 +985,8 @@ PyInterpreterState_Delete(PyInterpreterState *interp)`
`985`	`985`
`986`	`986`	`_PyObject_FiniState(interp);`
`987`	`987`
	`988`	`+ PyConfig_Clear(&interp->config);`
	`989`	`+`
`988`	`990`	`free_interpreter(interp);`
`989`	`991`	`}`
`990`	`992`