debug test is hanging

Environment data

• VS Code version: 1.30.1
• Extension version (available under the Extensions sidebar): 2018.12.1
• OS and version: Ubuntu 16.04
• Python version (& distribution if applicable, e.g. Anaconda): anaconda Python 3.6.7 64 bit
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): conda
• Relevant/affected Python packages and their versions: pytest 3.9.3

Expected behaviour

After setting a breakpoint in single test, when clicking “Debug Test” above the test, it should stop at the breakpoint.

Actual behaviour

VS Code launches the debugging tool bar and it hangs there. Run Test works properly.

Steps to reproduce:

Simply try to debug test in the described environment with pytest.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Nothing is shown.

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help; turn on source maps to make any tracebacks be useful by running Enable source map support for extension debugging)

Nothing is written when clicking debug in developer tools console.

[iban-rodriguez]

I’m also facing this problem with one of my projects. Impossible to start test debugging.

I’m working on Linux too and can reproduce the issue with @jruizaranguren environment.

[jruizaranguren]

I have reproduced the issue and upload the required files to this repo.

Steps to reproduce

> create conda environment from file: conda env create -f issue3869_env.yml
> source activate issue3869
> code .

Then, set a breakpoint in test_debugging.py::test_does_not_set_breakpoints.

Additional info

We reproduce the issue in vscode 1.30.1, but it works in versions 1.21.1 and 1.25.1.