Regression: multiple assignments in match statement

### Summary

```python
from dataclasses import dataclass


@dataclass
class ClassLabel:
    num_classes: int


def expectation_parameters(feature_type: ClassLabel | None) -> int:
    match feature_type:
        case ClassLabel(num_classes=num_classes):  # Multiple assignments here!?
            return num_classes
        case _:
            raise TypeError
```

### Version

0.11.3