UnicodeEncodeError: 'utf-8' codec can't encode characters in position 0-21: surrogates not allowed

Sentry Issue: SWH-LOADER-CORE-1YY

UnicodeEncodeError: 'utf-8' codec can't encode characters in position 0-21: surrogates not allowed
(9 additional frame(s) were not displayed)
...
  File "/opt/swh/.local/lib/python3.10/site-packages/swh/loader/core/nar.py", line 212, in _serialize
    self._filter_and_serialize(fso)
  File "/opt/swh/.local/lib/python3.10/site-packages/swh/loader/core/nar.py", line 181, in _filter_and_serialize
    self._serializeEntry(path)
  File "/opt/swh/.local/lib/python3.10/site-packages/swh/loader/core/nar.py", line 223, in _serializeEntry
    self.str_(["entry", "(", "name", fso.name, "node"])
  File "/opt/swh/.local/lib/python3.10/site-packages/swh/loader/core/nar.py", line 142, in str_
    self.str_(stuff)
  File "/opt/swh/.local/lib/python3.10/site-packages/swh/loader/core/nar.py", line 135, in str_
    byte_sequence = thing.encode("utf-8")