Stepping over fails in debugger with message Unable to open '<string>' FIle not found

Getting this error when debugging this file:

import typing
from dataclasses import dataclass, field


@dataclass
class Thing:
    a: typing.Any
    b: typing.Any
    c: typing.Any = field(init=False, repr=False)

    def __post_init__(self):
        self.c = self.a + self.b


Thing(a=1, b=2)

If I set a breakpoint at the self.c = line and then click ‘step over’, I see

Unable to open '<string>': File not found (file:///Users/malmaud/Dropbox (MIT)/Desktop/fun/<string>).

I guess this is related to https://github.com/Microsoft/vscode-python/issues/3063.

VSCode 1.29.1 Python 3.6.7 with dataclasses package installed via pip install dataclasses Extension 2018.10.1

Screenshot:

[berkobob]

Me too. Let me know if you need any log files.

[luabud]

Fixed upstream (https://github.com/microsoft/ptvsd/issues/1071)