Parsing errors when using `match` statement

[salotz]

INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/libcst/_parser/base_parser.py", line 151, in _add_token
INTERNALERROR>     plan = stack[-1].dfa.transitions[transition]
INTERNALERROR>            ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
INTERNALERROR> KeyError: TokenType(NAME)
INTERNALERROR> 
INTERNALERROR> During handling of the above exception, another exception occurred:
INTERNALERROR> 
INTERNALERROR> Traceback (most recent call last):
INTERNALERROR> 
INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/_pytest/main.py", line 268, in wrap_session
INTERNALERROR>     session.exitstatus = doit(config, session) or 0
INTERNALERROR>                          ^^^^^^^^^^^^^^^^^^^^^
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/_pytest/main.py", line 322, in _main
INTERNALERROR>     config.hook.pytest_runtestloop(session=session)
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/pluggy/_hooks.py", line 501, in __call__
INTERNALERROR>     return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
INTERNALERROR>            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/pluggy/_manager.py", line 119, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
INTERNALERROR>            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/pluggy/_callers.py", line 155, in _multicall
INTERNALERROR>     teardown[0].send(outcome)
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/pytest_pointers/plugin.py", line 153, in pytest_runtestloop
INTERNALERROR>     for func in funcs:
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/pytest_pointers/utils.py", line 74, in __iter__
INTERNALERROR>     tree = cst.parse_module(f.read())
INTERNALERROR>            ^^^^^^^^^^^^^^^^^^^^^^^^^^
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/libcst/_parser/entrypoints.py", line 70, in parse_module
INTERNALERROR>     result = _parse(
INTERNALERROR>              ^^^^^^^
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/libcst/_parser/entrypoints.py", line 50, in _parse
INTERNALERROR>     result = parser.parse()
INTERNALERROR>              ^^^^^^^^^^^^^^
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/libcst/_parser/base_parser.py", line 110, in parse
INTERNALERROR>     self._add_token(token)
INTERNALERROR>   File "/home/salotz/tree/ibeks/devel/bos/.nox/test_unit/lib/python3.11/site-packages/libcst/_parser/base_parser.py", line 186, in _add_token
INTERNALERROR>     raise ParserSyntaxError(
INTERNALERROR> libcst._exceptions.ParserSyntaxError: Syntax Error @ 37:15.
INTERNALERROR> Incomplete input. Encountered 'json_loads', but expected ';', or 'NEWLINE'.
INTERNALERROR> 
INTERNALERROR>         match json_loads(data, **kwargs):
INTERNALERROR>        

Getting a parse error from libcst when using the match statement.