from dataclasses import dataclass, replace

@dataclass()
class A:
    a: int

class B(A):
    def __init__(self):
        super().__init__(a=1)

obj1 = B()
obj2 = replace(obj1, a=2)

  File "/usr/lib/python3.9/dataclasses.py", line 1284, in replace
    return obj.__class__(**changes)
TypeError: __init__() got an unexpected keyword argument 'a'


When a class extends a dataclass and overrides `__init__`, `replace` still accepts it as a dataclass according to the PEP but fails at constructing, since the `__init__`-signature doesn't match anymore.