Issue #15291: Fix a memory leak where AST nodes where not properly deallocated.

Misc/NEWS

@@ -10,6 +10,9 @@ What's New in Python 3.3.0 Beta 2?
 Core and Builtins
 -----------------
 
+- Issue #15291: Fix a memory leak where AST nodes where not properly
+  deallocated.
+
 - Issue #15110: Fix the tracebacks generated by "import xxx" to not show
   the importlib stack frames.
 

Parser/asdl_c.py

@@ -612,6 +612,7 @@ static void
 ast_dealloc(AST_object *self)
 {
     Py_CLEAR(self->dict);
+    Py_TYPE(self)->tp_free(self);
 }
 
 static int

Python/Python-ast.c

@@ -464,6 +464,7 @@ static void
 ast_dealloc(AST_object *self)
 {
     Py_CLEAR(self->dict);
+    Py_TYPE(self)->tp_free(self);
 }
 
 static int