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

[DonJayamanne]

@malmaud commented on Wed Nov 21 2018

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 microsoft/vscode-python#3063.

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

Screenshot:

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@DonJayamanne commented on Wed Nov 21 2018

What's the name of the file you are debugging

---

@malmaud commented on Wed Nov 21 2018

/Users/malmaud/Dropbox (MIT)/Desktop/fun/debug.py

[karolzlot]

I have similar message box:

i made some investigation:

it seems to appear at random line where word 'mutagen' is

[jarlva]

Having similar issue and is also random.
Since debugging is done on a remote server and since the issue is random and only when taking the time to step in/out, it seems clear that the issue is on the remote server.

On that note - is there a way to change that to debug 100% locally?

[karthiknadig]

This is fixed. In cases such as dataclass, step-over should work. For step-in/out cases we currently show a temp file with message saying that we couldn't retrieve sources. IDE should not show File Not Found for those cases.