diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index c0f539dd93..67f84e940f 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 |