bpo-40355: Improve error messages in ast.literal_eval with malformed Dict nodes (GH-19868)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 9063b3d2d7..a8a13fdcd7 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -965,6 +965,12 @@ Module(
         self.assertRaises(ValueError, ast.literal_eval, '3+(0+6j)')
         self.assertRaises(ValueError, ast.literal_eval, '-(3+6j)')
 
+    def test_literal_eval_malformed_dict_nodes(self):
+        malformed = ast.Dict(keys=[ast.Constant(1), ast.Constant(2)], values=[ast.Constant(3)])
+        self.assertRaises(ValueError, ast.literal_eval, malformed)
+        malformed = ast.Dict(keys=[ast.Constant(1)], values=[ast.Constant(2), ast.Constant(3)])
+        self.assertRaises(ValueError, ast.literal_eval, malformed)
+
     def test_bad_integer(self):
         # issue13436: Bad error message with invalid numeric values
         body = [ast.ImportFrom(module='time',