Issue #24580: Symbolic group references to open group in re patterns now are

explicitly forbidden as well as numeric group references.
2025-10-09 16:34:44 +00:00 · 2015-07-18 23:27:00 +03:00 · 2015-07-18 23:27:00 +03:00 · 485407ce1e
commit 485407ce1e
parent 2489bd5d4e
3 changed files with 8 additions and 0 deletions
--- 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