Issue #17051: Fix a memory leak in os.path.isdir() on Windows. Patch by Robert Xiao.

Misc/NEWS

@@ -200,6 +200,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #17051: Fix a memory leak in os.path.isdir() on Windows. Patch by
+  Robert Xiao.
+
 - Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase
   interface and support all mandatory methods and properties.
 

Modules/posixmodule.c

@@ -4229,6 +4229,7 @@ posix__isdir(PyObject *self, PyObject *args)
         return NULL;
 
     attributes = GetFileAttributesA(path);
+    PyMem_Free(path);
     if (attributes == INVALID_FILE_ATTRIBUTES)
         Py_RETURN_FALSE;