is mypy failing here

[Robin Becker]

I haven't used dataclasses or typing very much, but while playing about I found this didn't give me an expected error

(.py312) robin at minikat:~/devel/reportlab
$ cat tmp/examples/tdc.py && python tmp/examples/tdc.py && mypy tmp/examples/tdc.py
##################################
from dataclasses import dataclass

@dataclass
class DC:
     a: str
     b: str

def main():
     dc = DC(DC, "B")
     print(dc)

if __name__ == "__main__":
     main()
##################################
DC(a=<class '__main__.DC'>, b='B')
Success: no issues found in 1 source file
(.py312) robin at minikat:~/devel/reportlab

DC.a is supposed to be a str and I expected mypy to indicate a type error

should typing work for this case?
--
Robin Becker