Multi-level inheritance: duplicate arguments in ctors

[aldanor]

A seemingly harmless example:

@attr.s
class Foo(object):
    a = attr.ib()

@attr.s
class Bar(Foo):
    pass

@attr.s
class Baz(Bar):
    pass

fails with

  File "<attrs generated init 5250a51181cb781b2576810943a33169c4fea664>", line 1
SyntaxError: duplicate argument 'a' in function definition

Looks like attrs tries to include a twice in parameter list of Baz#__init__?

(possibly related: #24)

[hynek]

That looks like the same bug as #24 and your example works fine for me. Are you using an old release by accident? Check attr.__version__ please, it should be 15.2.0.

[aldanor]

Whoah, indeed -- I had 15.1 installed, and it now works perfectly fine on 15.2 👍 Sorry for the hassle!