False positive warning (?)

[A5rocks]

Either this is a false positive, or evaluation of generated code's forward references is broken -- I really hope it's the former.

Minimal case:
repro.py:

from __future__ import annotations

import attr
import typing

@attr.s(auto_attribs=True)
class Example:
    blah: typing.Type[int]

Console output:

...
WARNING: Cannot resolve forward reference in type annotations of "repro.Example": name 'typing' is not defined
...

However, the docs still render alright (?) and if you use intersphinx it does work... So, mixed feelings from this. I may have messed up with browser cache or something, try this out and see for yourself.

Note that you can either comment out @attr.s(auto_attribs=True), remove auto_attribs=True (for some reason?), or comment out from __future__ import annotations to get rid of this warning.

I'm new to this whole documentation thing, so I may have missed something though.

[A5rocks]

More info:

• You can typing.get_type_hints from another module, here's an example of how:

from __init__ import Example
from typing import get_type_hints

print(get_type_hints(Example))

• Stack trace:

Traceback (most recent call last):
 File "C:\Users\A5rocks\Documents\fun\python-tests\docs\source\sphinx_autodoc_typehints.py", line 230, in get_all_type_hints
   rv = get_type_hints(obj)
 File "C:\Python39\lib\typing.py", line 1442, in get_type_hints
   value = _eval_type(value, globalns, localns)
 File "C:\Python39\lib\typing.py", line 277, in _eval_type
   return t._evaluate(globalns, localns, recursive_guard)
 File "C:\Python39\lib\typing.py", line 533, in _evaluate
   eval(self.__forward_code__, globalns, localns),
 File "<string>", line 1, in <module>
NameError: name 'typing' is not defined

I cannot think of a reason why this would work in one context and not in another....

Okay, so the obj that is erroring is the __init__ method, whereas in my example it's the whole class. Now this is starting to make some sense...

Looks like this is an attrs issue / will be fixed in the next version, whoops! python-attrs/attrs#760