KeyError: ReservedString(}) #207
Description
I've tried to apply mutmut to PyPDF2 and failed. Initially I thought the issue was with mutmut ( boxed/mutmut#252 ) , but I guess it's a parso bug.
Minimal example
import parso
parso.parse('stream.write(b_(rf"\{ord_(c):0>3o}"))', error_recovery=False)Traceback
Traceback (most recent call last):
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/parser.py", line 180, in _add_token
plan = stack[-1].dfa.transitions[transition]
KeyError: ReservedString(})
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/__init__.py", line 58, in parse
return grammar.parse(code, **kwargs)
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/grammar.py", line 156, in parse
root_node = p.parse(tokens=tokens)
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/python/parser.py", line 79, in parse
return super().parse(tokens)
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/parser.py", line 129, in parse
self._add_token(token)
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/parser.py", line 186, in _add_token
self.error_recovery(token)
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/python/parser.py", line 140, in error_recovery
return super().error_recovery(token)
File "/home/moose/.pyenv/versions/3.10.2/lib/python3.10/site-packages/parso/parser.py", line 152, in error_recovery
raise ParserSyntaxError('SyntaxError: invalid syntax', error_leaf)
parso.parser.ParserSyntaxError: ('SyntaxError: invalid syntax', <ErrorLeaf: PythonTokenTypes.OP:'}', (1, 33)>)
Environment
$ python --version
Python 3.10.2
>>> parso.__version__
'0.8.3'