self = <austin.format.mojo.MojoStreamReader object at 0x7f13b6d847f0>

    def parse_event(self) -> t.Optional[MojoEvent]:
        """Parse a single event."""
        try:
            (event_id,) = self.read()
        except ValueError:
            return None
    
        try:
>           event = t.cast(dict, self.__handlers__)[event_id](self)
E           KeyError: 13

.venv/lib/python3.10/site-packages/austin/format/mojo.py:622: KeyError

The above exception was the direct cause of the following exception:

py = '3.12', austin = Variant('austinp')

    @allpythons()
    @variants
    def test_fork_cpu_time_cpu_bound(py, austin):
>       result = austin("-ci", "1ms", *python(py), target("target34.py"))

test/functional/test_fork.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
test/utils.py:322: in __call__
    return self.prepare_result(result, expect_fail, convert)
test/utils.py:335: in prepare_result
    raise e
test/utils.py:332: in prepare_result
    result.samples, result.metadata = parse_mojo(result.stdout)
test/utils.py:505: in parse_mojo
    samples = [_ for _ in mojo if isinstance(_, AustinSample)]
test/utils.py:505: in <listcomp>
    samples = [_ for _ in mojo if isinstance(_, AustinSample)]
.venv/lib/python3.10/site-packages/austin/format/mojo.py:664: in __iter__
    for e in self.parse():
.venv/lib/python3.10/site-packages/austin/format/mojo.py:653: in parse
    if (e := self.parse_event()) is None:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <austin.format.mojo.MojoStreamReader object at 0x7f13b6d847f0>

    def parse_event(self) -> t.Optional[MojoEvent]:
        """Parse a single event."""
        try:
            (event_id,) = self.read()
        except ValueError:
            return None
    
        try:
            event = t.cast(dict, self.__handlers__)[event_id](self)
            object.__setattr__(event, "raw", bytes(self._last_bytes))
            self._last_bytes.clear()
            return event
        except KeyError as exc:
>           raise ValueError(
                f"Unhandled event: {event_id} (offset: {self._offset}, last read: {self._last_read})"
            ) from exc
E           ValueError: Unhandled event: 13 (offset: 3384, last read: 1)

.venv/lib/python3.10/site-packages/austin/format/mojo.py:627: ValueError