bpo-38425: Fix ‘res’ may be used uninitialized warning (GH-16688)

diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 3a9d4e6b4b923f6010f354dbac6e9fc90a11a2d2..3a821cc9265c9d44e4ad3013f55a68231fec6a74 100755 (executable)
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -1197,7 +1197,6 @@ PyObject* PyAST_mod2obj(mod_ty t)
 /* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */
 mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
 {
-    mod_ty res;
     PyObject *req_type[3];
     const char * const req_name[] = {"Module", "Expression", "Interactive"};
     int isinstance;
@@ -1223,6 +1222,8 @@ mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
                      req_name[mode], _PyType_Name(Py_TYPE(ast)));
         return NULL;
     }
+
+    mod_ty res = NULL;
     if (obj2ast_mod(ast, &res, arena) != 0)
         return NULL;
     else

diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 558d9ebea5c723e28a91194d7f8afe0150ea99c1..e2c703d815552ee1a3f2dc09fb2d3d0a2a7284a4 100644 (file)
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -10250,7 +10250,6 @@ PyObject* PyAST_mod2obj(mod_ty t)
 /* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */
 mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
 {
-    mod_ty res;
     PyObject *req_type[3];
     const char * const req_name[] = {"Module", "Expression", "Interactive"};
     int isinstance;
@@ -10276,6 +10275,8 @@ mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
                      req_name[mode], _PyType_Name(Py_TYPE(ast)));
         return NULL;
     }
+
+    mod_ty res = NULL;
     if (obj2ast_mod(ast, &res, arena) != 0)
         return NULL;
     else