exports: interface does not work for inline interfaces

[charles-cooper]

Version Information

• vyper Version (output of vyper --version): e1adb7b

What's your issue about?

exports: interface does not work for interfaces which were declared inline. example:

# lib.vy
from ethereum.ercs import IERC20

asset: public(immutable(IERC20))
 
interface IAsset:
    def asset() -> address: view

implements: IAsset

@deploy
def __init__(asset_: IERC20):
    asset = asset_

# main.vy

from ethereum.ercs import IERC20

import lib
initializes: lib

exports: lib.IAsset

@deploy
def __init__(asset_: IERC20):
    lib.__init__(asset_)

[charles-cooper]

mildly related: #3954