[00:00:25][????????][   track:pkgs/fonts/twemoji.bst        ] BUG     Track

    An unhandled exception occured:
    
    Traceback (most recent call last):
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_projectrefs.py", line 144, in _lookup
        node = element_list.mapping_at(source_index)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "src/buildstream/node.pyx", line 1262, in buildstream.node.SequenceNode.mapping_at
      File "src/buildstream/node.pyx", line 1278, in buildstream.node.SequenceNode.mapping_at
    IndexError: list index out of range
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_scheduler/jobs/job.py", line 438, in child_action
        result = self.child_process()  # pylint: disable=assignment-from-no-return
                 ^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_scheduler/jobs/elementjob.py", line 91, in child_process
        return self._action_cb(self._element)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_scheduler/queues/trackqueue.py", line 65, in _track_element
        return element._track()
               ^^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/element.py", line 1390, in _track
        return self.__sources.track(self._get_workspace())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_elementsources.py", line 97, in track
        new_ref = source._track()
                  ^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/source.py", line 1214, in _track
        self._set_ref(new_ref, save=False)
      File "/usr/local/lib64/python3.11/site-packages/buildstream/source.py", line 1065, in _set_ref
        node = toplevel_refs.lookup_ref(project.name, element_name, element_idx, write=True)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_projectrefs.py", line 113, in lookup_ref
        node = self._lookup(self._toplevel_save, project, element, source_index, ensure=True)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "/usr/local/lib64/python3.11/site-packages/buildstream/_projectrefs.py", line 150, in _lookup
        node = element_list.mapping_at(source_index)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "src/buildstream/node.pyx", line 1262, in buildstream.node.SequenceNode.mapping_at
      File "src/buildstream/node.pyx", line 1278, in buildstream.node.SequenceNode.mapping_at
    IndexError: list index out of range