Sphinx 2.0: napoleon extension fails to parse exception with tilde

[RazerM]

Describe the bug
Using the napoleon extension with napoleon_numpy_docstring = False, an exception with a tilde in front fails to parse.

I have a docstring

"""
    Raises:
        ValueError: description.
        ~mymodule.MyError: description.
"""

This regex fails:

sphinx/sphinx/ext/napoleon/docstring.py

Lines 103 to 104 in 1499a97

	_name_rgx = re.compile(r"^\s*(:(?P<role>\w+):`(?P<name>[a-zA-Z0-9_.-]+)`|"
	r" (?P<name2>[a-zA-Z0-9_.-]+))\s*", re.X)

at this line:

sphinx/sphinx/ext/napoleon/docstring.py

Line 703 in 1499a97

m = self._name_rgx.match(_type).groupdict()

To Reproduce

from sphinx.ext.napoleon.docstring import GoogleDocstring
assert GoogleDocstring._name_rgx.match('~mymodule.MyError') is None

Expected behavior
Sphinx renders it as if I used :raises ~mymodule.MyError: description.

Environment info

• Sphinx version: 2.0.0
• Sphinx extensions: sphinx.ext.napoleon

Additional context
Bug introduced by #4046

[gmc444-b]

I found a similar error when parsing a section where the exception was enclosed in backquotes, ie:

    Raises:
        `SomeError`

[RobRuana]

@tk0miya I must apologize. I no longer have the time to maintain Napoleon. I probably should have said something sooner.

[tk0miya]

@RobRuana Don't mind. I'll try to maintain it. Thank you for letting me know

[tk0miya]

I just posted #6237 to resolve this :-)

[tk0miya]

Fixed by #6237.
Thank you for reporting!