[3.14] pythongh-140301: Fix memory leak in subinterpreter PyConfig cleanup (pythonGH-140303) (python#140360)

miss-islington · ashm-dev · kumaraditya303 · web-flow · commit d7fe4e99a2d1 · 2025-10-20T09:54:41.000Z
pythongh-140301: Fix memory leak in subinterpreter `PyConfig` cleanup (pythonGH-140303) (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
@@ -1049,6 +1049,8 @@ 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
`@@ -1049,6 +1049,8 @@ PyInterpreterState_Delete(PyInterpreterState *interp)`
`1049`	`1049`
`1050`	`1050`	`_PyObject_FiniState(interp);`
`1051`	`1051`
	`1052`	`+ PyConfig_Clear(&interp->config);`
	`1053`	`+`
`1052`	`1054`	`free_interpreter(interp);`
`1053`	`1055`	`}`
`1054`	`1056`