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[3.11] gh-96587: Raise SyntaxError for PEP654 on older feature_version (GH-96588) (#96591)

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(cherry picked from commit 2c7d2e8d46)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
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Nikita Sobolev 2022-10-06 01:00:13 +03:00 • committed by Pablo Galindo
parent 84fd4a54a6
commit 9cb7324e8f
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4 changed files with 15 additions and 2 deletions
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4
Grammar/python.gram
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@ -412,7 +412,9 @@ try_stmt[stmt_ty]:
| invalid_try_stmt
| 'try' &&':' b=block f=finally_block { _PyAST_Try(b, NULL, NULL, f, EXTRA) }
| 'try' &&':' b=block ex[asdl_excepthandler_seq*]=except_block+ el=[else_block] f=[finally_block] { _PyAST_Try(b, ex, el, f, EXTRA) }
| 'try' &&':' b=block ex[asdl_excepthandler_seq*]=except_star_block+ el=[else_block] f=[finally_block] { _PyAST_TryStar(b, ex, el, f, EXTRA) }
| 'try' &&':' b=block ex[asdl_excepthandler_seq*]=except_star_block+ el=[else_block] f=[finally_block] {
CHECK_VERSION(stmt_ty, 11, "Exception groups are",
_PyAST_TryStar(b, ex, el, f, EXTRA)) }
# Except statement

9
Lib/test/test_ast.py
View file

@ -771,6 +771,15 @@ class AST_Tests(unittest.TestCase):
with self.assertRaises(SyntaxError):
ast.parse('(x := 0)', feature_version=(3, 7))
def test_exception_groups_feature_version(self):
code = dedent('''
try: ...
except* Exception: ...
''')
ast.parse(code)
with self.assertRaises(SyntaxError):
ast.parse(code, feature_version=(3, 10))
def test_constant_as_name(self):
for constant in "True", "False", "None":
expr = ast.Expression(ast.Name(constant, ast.Load()))

2
Misc/NEWS.d/next/Core and Builtins/2022-09-05-19-20-44.gh-issue-96587.bVxhX2.rst Normal file
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@ -0,0 +1,2 @@
Correctly raise ``SyntaxError`` on exception groups (:pep:`654`) on python
versions prior to 3.11

2
Parser/parser.c generated
View file

@ -6970,7 +6970,7 @@ try_stmt_rule(Parser *p)
UNUSED(_end_lineno); // Only used by EXTRA macro
int _end_col_offset = _token->end_col_offset;
UNUSED(_end_col_offset); // Only used by EXTRA macro
_res = _PyAST_TryStar ( b , ex , el , f , EXTRA );
_res = CHECK_VERSION ( stmt_ty , 11 , "Exception groups are" , _PyAST_TryStar ( b , ex , el , f , EXTRA ) );
if (_res == NULL && PyErr_Occurred()) {
p->error_indicator = 1;
p->level--;