Type of parameter "self" is unknown (reportUnknownParameterType) when subclassing typing.Protocol

[ghost]

Environment data

• Language Server version: 2020.9.8
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): Anaconda Python 3.8.5

Expected behaviour

The "self" parameter should have the type of class to which its method belongs (as it is in other cases).

Actual behaviour

from typing import Protocol

class Foo(Protocol):
    def bar(self) -> None:
        ...

reports

(parameter) self: Unknown
"self" is not accessed Pylance
Type of parameter "self" is unknown Pylance (reportUnknownParameterType)

[jakebailey]

@erictraut Seems like a bug for self to be marked as unknown in this context (or any context, really...)

[erictraut]

Thanks for the bug report. This will be fixed in the next release.

[jakebailey]

This issue has been fixed in version 2020.10.0, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#2020100-7-october-2020