ptvsd debugging stopped working in latest release

Debugging my twistd based application was working fine. It no longer does.

Environment data

• VS Code version: 1.29.1
• Extension version (available under the Extensions sidebar): 2018.11.0
• OS and version: Mac OS 10.14 Mojave
• Python version (& distribution if applicable, e.g. Anaconda): XXX
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): virtualenv
• Relevant/affected Python packages and their versions: ptvsd

launch.json entry:

        {
            "name": "myprogram",
            "type": "python",
            "request": "launch",
            "stopOnEntry": true,
            "pythonPath": "/Users/offero/.virtualenvs/myvenv/bin/python",
            "program": "/Users/offero/.virtualenvs/myvenv/bin/mytwitstdprogram",
            "args": [
              "-n"
            ],
            "cwd": "${workspaceRoot}",
            "env": {},
            "envFile": "${workspaceRoot}/.env"
        }

Actual behavior

It just hangs.

Expected behavior

Debug session starts.

Steps to reproduce:

1. Add launch.json entry
2. Run

Logs

If I add these lines to my launch.json

            "console": "integratedTerminal",
            "stopOnEntry": false,

I get this output:

cd /Users/offero/Development/myworkspace ; env "PYTHONIOENCODING=UTF-8" "PYTHONUNBUFFERED=1" /Users/offero/.virtualenvs/myvenv/bin/python /Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd_launcher.py --default --client --host localhost --port 51192 /Users/offero/.virtualenvs/myvenv/bin/mytwistdprogram -n

...

asctime=2018-11-30T13:16:42 levelname=ERROR name=twistd message="Traceback (most recent call last):"
asctime=2018-11-30T13:16:42 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd_launcher.py\", line 45, in <module>"
asctime=2018-11-30T13:16:42 levelname=ERROR name=twistd message="    main(ptvsdArgs)"
asctime=2018-11-30T13:16:42 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd/ptvsd/__main__.py\", line 265, in main"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="    wait=args.wait)"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd/ptvsd/__main__.py\", line 258, in handle_args"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="    debug_main(addr, name, kind, *extra, **kwargs)"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd/ptvsd/_local.py\", line 45, in debug_main"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="    run_file(address, name, *extra, **kwargs)"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd/ptvsd/_local.py\", line 79, in run_file"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="    run(argv, addr, **kwargs)"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd/ptvsd/_local.py\", line 140, in _run"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="    _pydevd.main()"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="  File \"/Users/offero/.vscode/extensions/ms-python.python-2018.11.0/pythonFiles/experimental/ptvsd/ptvsd/_vendored/pydevd/pydevd.py\", line 1925, in main"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="    debugger.connect(host, port)"
asctime=2018-11-30T13:16:43 levelname=ERROR name=twistd message="TypeError: 'NoneType' object is not callable"
[1]    56333 terminated  env "PYTHONIOENCODING=UTF-8" "PYTHONUNBUFFERED=1"   --default --client --host

[dvirtz]

https://github.com/Microsoft/ptvsd/issues/987 has been fixed. When can we expect this to be released?

[ftrofin]

I have the same problem with the latest version: VS Code Mac 1.30.1 on macOS 10.14.1 and Python extension 2018.12.1. This renders debugging Python code basically useless. Please fix!