dataclasses error message "non-default argument '<name>' follows default argument" should mention the default argument field

[ericvsmith]

The error message from this dataclass:

@dataclass
class C:
    x: int = 0
    y: int

is
TypeError: non-default argument 'y' follows default argument

It would be helpful if it was:
TypeError: non-default argument 'y' follows default argument 'x'

In this case, of course, the default argument field name is obvious, but I have a complicated case where this would be useful information.

I have a patch ready.

Linked PRs

• gh-107838: dataclasses: improve error message when non-default field follows default field #110608

[sobolevn]

@Eclips4 we don't really use triaged :)

[ericvsmith]

This was merged in e4275f4