diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_ast.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py index a8853c7..dc24126 100644 --- a/Lib/test/test_ast.py +++ b/Lib/test/test_ast.py @@ -399,6 +399,14 @@ class AST_Tests(unittest.TestCase): compile(m, "<test>", "exec") self.assertIn("string must be of type str", str(cm.exception)) + def test_empty_yield_from(self): + # Issue 16546: yield from value is not optional. + empty_yield_from = ast.parse("def f():\n yield from g()") + empty_yield_from.body[0].body[0].value.value = None + with self.assertRaises(ValueError) as cm: + compile(empty_yield_from, "<test>", "exec") + self.assertIn("field value is required", str(cm.exception)) + class ASTHelpers_Test(unittest.TestCase): |