diff options
| -rw-r--r-- | Lib/sre_parse.py | 3 | ||||
| -rw-r--r-- | Lib/test/test_re.py | 2 | ||||
| -rw-r--r-- | Misc/NEWS | 3 |
3 files changed, 8 insertions, 0 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index c0f539d..67f84e9 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -675,6 +675,9 @@ def _parse(source, state): if gid is None: msg = "unknown group name %r" % name raise source.error(msg, len(name) + 1) + if not state.checkgroup(gid): + raise source.error("cannot refer to an open group", + len(name) + 1) state.checklookbehindgroup(gid, source) subpatternappend((GROUPREF, gid)) continue diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py index 5b71612..7a74141 100644 --- a/Lib/test/test_re.py +++ b/Lib/test/test_re.py @@ -224,6 +224,8 @@ class ReTests(unittest.TestCase): self.checkPatternError('(?P<a>)(?P<a>)', "redefinition of group name 'a' as group 2; " "was group 1") + self.checkPatternError('(?P<a>(?P=a))', + "cannot refer to an open group", 10) self.checkPatternError('(?Pxy)', 'unknown extension ?Px') self.checkPatternError('(?P<a>)(?P=a', 'missing ), unterminated name', 11) self.checkPatternError('(?P=', 'missing group name', 4) @@ -41,6 +41,9 @@ Core and Builtins Library ------- +- Issue #24580: Symbolic group references to open group in re patterns now are + explicitly forbidden as well as numeric group references. + - Issue #24206: Fixed __eq__ and __ne__ methods of inspect classes. - Issue #24631: Fixed regression in the timeit module with multiline setup. |