The not our ref likely happens due to gitlab.gnome.org's http redirection or some bot protection but it should never crash. ```yaml sources: - kind: git_repo url: gnome:libglnx.git ref: ccea836b799256420788c463a638ded0636b1632 directory: subprojects/libglnx ``` ``` An unhandled exception occured: Traceback (most recent call last): File "/home/bbhtt/Git/gitlab/freedesktop-sdk/buildstream-plugins-community/src/buildstream_plugins_community/sources/_git_utils.py", line 289, in fetch remote_refs = client.fetch( path, ...<2 lines>... depth=self.depth, ) File "/usr/lib/python3.14/site-packages/dulwich/client.py", line 1171, in fetch result = self.fetch_pack( path, ...<9 lines>... shallow_exclude=shallow_exclude, ) File "/usr/lib/python3.14/site-packages/dulwich/client.py", line 3910, in fetch_pack (new_shallow, new_unshallow) = _read_shallow_updates( ~~~~~~~~~~~~~~~~~~~~~^ resp_proto.read_pkt_seq() ^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/usr/lib/python3.14/site-packages/dulwich/client.py", line 615, in _read_shallow_updates raise GitProtocolError(f"unknown command {pkt!r}") dulwich.errors.GitProtocolError: unknown command b'ERR upload-pack: not our ref ccea836b799256420788c463a638ded0636b1632' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib/python3.14/site-packages/buildstream/_scheduler/jobs/job.py", line 350, in child_action result = self.child_process() # pylint: disable=assignment-from-no-return File "/usr/lib/python3.14/site-packages/buildstream/_scheduler/jobs/elementjob.py", line 81, in child_process return self._action_cb(self._element) ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/buildstream/_scheduler/queues/fetchqueue.py", line 75, in _fetch_not_original element._fetch(fetch_original=False) ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/buildstream/element.py", line 2278, in _fetch self.__sources.fetch() ~~~~~~~~~~~~~~~~~~~~^^ File "/usr/lib/python3.14/site-packages/buildstream/_elementsources.py", line 221, in fetch self.fetch_sources() ~~~~~~~~~~~~~~~~~~^^ File "/usr/lib/python3.14/site-packages/buildstream/_elementsources.py", line 250, in fetch_sources self._fetch_source(source) ~~~~~~~~~~~~~~~~~~^^^^^^^^ File "/usr/lib/python3.14/site-packages/buildstream/_elementsources.py", line 431, in _fetch_source source._fetch() ~~~~~~~~~~~~~^^ File "/usr/lib/python3.14/site-packages/buildstream/source.py", line 1481, in _fetch self.__do_fetch() ~~~~~~~~~~~~~~~^^ File "/usr/lib/python3.14/site-packages/buildstream/source.py", line 1957, in __do_fetch fetcher.fetch(mirror) ~~~~~~~~~~~~~^^^^^^^^ File "/home/bbhtt/Git/gitlab/freedesktop-sdk/buildstream-plugins-community/src/buildstream_plugins_community/sources/_git_utils.py", line 299, in fetch remote_refs = client.fetch( path, repo, determine_wants=track_want ) File "/usr/lib/python3.14/site-packages/dulwich/client.py", line 1171, in fetch result = self.fetch_pack( path, ...<9 lines>... shallow_exclude=shallow_exclude, ) File "/usr/lib/python3.14/site-packages/dulwich/client.py", line 3832, in fetch_pack wants = determine_wants(refs_filtered) File "/home/bbhtt/Git/gitlab/freedesktop-sdk/buildstream-plugins-community/src/buildstream_plugins_community/sources/_git_utils.py", line 271, in track_want wanted_refs = get_matching_refs( refs, self.source.tracking, self.source.exclude ) File "/home/bbhtt/Git/gitlab/freedesktop-sdk/buildstream-plugins-community/src/buildstream_plugins_community/sources/_git_utils.py", line 488, in get_matching_refs matching_regex = pattern_to_regex(tracking) File "/home/bbhtt/Git/gitlab/freedesktop-sdk/buildstream-plugins-community/src/buildstream_plugins_community/sources/_git_utils.py", line 478, in pattern_to_regex if pattern.startswith("refs/"): ^^^^^^^^^^^^^^^^^^ AttributeError: 'NoneType' object has no attribute 'startswith' ```