pythongh-140301: Fix memory leak in subinterpreter PyConfig cleanup (python#140303)

ashm-dev · kumaraditya303 · StanFromIreland · commit 459785b6ea3a · 2025-12-06T15:06:17.000Z
Co-authored-by: Kumar Aditya &lt;kumaraditya@python.org&gt;
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
@@ -963,6 +963,8 @@ 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
`@@ -963,6 +963,8 @@ PyInterpreterState_Delete(PyInterpreterState *interp)`
`963`	`963`
`964`	`964`	`_PyObject_FiniState(interp);`
`965`	`965`
	`966`	`+ PyConfig_Clear(&interp->config);`
	`967`	`+`
`966`	`968`	`free_interpreter(interp);`
`967`	`969`	`}`
`968`	`970`