Identifier with trailing underscore

[opk12]

A variable name with a trailing underscore gives Unknown target name:

$  cat test.py 
def f(id_: str):
    """Function.

    :param id_: A string."""
    print()
$  flake8 test.py 
test.py:4:1: RST306 Unknown target name: "id".

Could this be related to sphinx issue 1462?

[peterjc]

Hmm. Reminds me of #18 in that this is some Python syntax which taken in isolation is invalid RST.

Can it be escaped as a workaround?

[shifqu]

I can confirm that escaping each reference to the identifier with a trailing underscore removes the warning.