Debugger does not work

[noahmacca]

An update broke all debugging functionality for me; it was previously working fine.

Does this issue occur when all extensions are disabled?: YNo
No: You can't run a python debug session without the python extension. It occurs when all other extensions are disabled.

Otherwise please fill in the requested details below. "XXX" markers should not be present in the final bug report.
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Environment data

• VSCode Version: 1.23.1
• OS Version: Mac OS 10.13.4
• Extension version (available under the Extensions sidebar): 2018.4.0
• Python version (& distribution if applicable, e.g. Anaconda): brew, anaconda, tried them all
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): tried pipenv and global
• Relevant/affected Python packages and their versions: N/A
• Occurs with integrated or external console
• Happens with bash and fish as configured shell

Actual behavior

Expected behavior

Debugger attaches.

Steps to reproduce:

1. Make new project (mkdir test-py)
2. Open in vscode( code ./test-py)
3. Make new file hello.py
4. Make new line print('hello world')
5. Save
6. Hit F5

[DonJayamanne]

I'm unable to replicate this issue.
Please could you try the following:

• Re-install the extension
• Go into the launch.json file and add the setting "logToFile": true,
• Start debugging
• When you get the error:
  • Open Help->Toggle Developer Tool, and check if there are any errors in the console window (if yes, please provide them)
  • Open Extensions folder (go into command palette Open Extensions Folder)
  • Locate the Python extensions directory (ms-python.python-2018.4.0) and in there you'll find a file named debug.log, please upload the contents of that file.

If the above fails:

• Try installing the development build of the extension from here and test
• Finally try out the new experimental debugger. Just go into your launch.json file and change the setting "type":"python" to "type":"pythonExperimental" and test again

[rsryanstephen]

Hey @DonJayamanne, I'm having the same problem and there are no errors in the Developer Tool console window, but this is what was in debug.log:

21:34:08, 2018-6-1
From client: initialize({"clientID":"vscode","clientName":"Visual Studio Code","adapterID":"python","pathFormat":"path","linesStartAt1":true,"columnsStartAt1":true,"supportsVariableType":true,"supportsVariablePaging":true,"supportsRunInTerminalRequest":true,"locale":"en-us"})
To client: {"seq":0,"type":"response","request_seq":1,"command":"initialize","success":true,"body":{"supportsEvaluateForHovers":false,"supportsConditionalBreakpoints":true,"supportsConfigurationDoneRequest":true,"supportsFunctionBreakpoints":false,"supportsSetVariable":true,"exceptionBreakpointFilters":[{"label":"All Exceptions","filter":"all"},{"label":"Uncaught Exceptions","filter":"uncaught"}]}}
To client: {"seq":0,"type":"event","event":"initialized"}
From client: launch({"name":"Python: Current File","type":"python","request":"launch","program":"c:\Code-Repository\Cluster Monitor P\SendToApiforTextWidget.py","logToFile":true,"pythonPath":"C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\python.exe","cwd":"c:\Code-Repository\Cluster Monitor P","envFile":"c:\Code-Repository\Cluster Monitor P\.env","stopOnEntry":false,"console":"integratedTerminal","internalConsoleOptions":"neverOpen","debugOptions":["RedirectOutput"],"__sessionId":"d93b5a46-8d15-47a4-b592-1f0c4a745b08"})
To client: {"seq":0,"type":"event","event":"output","body":{"category":"telemetry","output":"DEBUGGER","data":{"trigger":"launch","console":"integratedTerminal","debugOptions":"RedirectOutput","pyspark":false}}}
From client: setBreakpoints({"source":{"name":"SendToApiforTextWidget.py","path":"C:\Code-Repository\Cluster Monitor P\SendToApiforTextWidget.py"},"lines":[38],"breakpoints":[{"line":38}],"sourceModified":false})
To client: "runInTerminal"({"kind":"integrated","title":"Python Debug Console","cwd":"c:\Code-Repository\Cluster Monitor P","args":["C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\python.exe","C:\Users\ryan.stephen\.vscode\extensions\ms-python.python-2018.4.0\pythonFiles\PythonTools\visualstudio_py_launcher.py","c:\Code-Repository\Cluster Monitor P","56866","34806ad9-833a-4524-8cd6-18ca4aa74f14","RedirectOutput,RedirectOutput","c:\Code-Repository\Cluster Monitor P\SendToApiforTextWidget.py"],"env":{"PYTHONIOENCODING":"UTF-8","PYTHONUNBUFFERED":"1"}}), timeout: 5000

[DonJayamanne]

@rsryanstephen
Have you tried the development build and the experimental debugger?

[rsryanstephen]

Ok, I installed the Development build from the location you specified, followed the install instructions that they gave me, and temporarily disabled the current Microsoft Python vscode extension. Then I couldn't Debug with the following error:

'Configured debug type 'python' is not supported.'
Or:
'Configured debug type 'pythonExperimental' is not supported.'

So I re-enabled the current Ms Python vscode extension, and tried with the experimental debugger, and I got the error:

'Timeout waiting for debugger connection'

[noahmacca]

I've tried reinstalling vscode and the extension from scratch, to no avail. Also tried the development build and got the same results. See results below.

type: python

• No errors in the developer tool console
• terminal errors:

cd /Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin ; env "PYTHONIOENCODING=UTF-8" "PYTHONUNBUFFERED=1" /usr/local/bin/python3 /Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/PythonTools/visualstudio_py_lau                             Mon Jun  4 13:41:25 2018ncher.py /Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin 62788 34806ad9-833a-4524-8cd6-18ca4aa74f14 RedirectOutput,RedirectOutput /Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/test.py
Traceback (most recent call last):
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/PythonTools/visualstudio_py_launcher.py", line 91, in <module>
    vspd.debug(filename, port_num, debug_id, debug_options, currentPid, run_as)
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/PythonTools/visualstudio_py_debugger.py", line 2607, in debug
    attach_process(port_num, debug_id, debug_options, currentPid, report = True)
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/PythonTools/visualstudio_py_debugger.py", line 2321, in attach_process
    raise Exception('failed to attach')
Exception: failed to attach

• debug.log contents

1:41:30 PM, 6/4/2018
From client: initialize({"clientID":"vscode","clientName":"Visual Studio Code","adapterID":"python","pathFormat":"path","linesStartAt1":true,"columnsStartAt1":true,"supportsVariableType":true,"supportsVariablePaging":true,"supportsRunInTerminalRequest":true,"locale":"en-us"})
To client: {"seq":0,"type":"response","request_seq":1,"command":"initialize","success":true,"body":{"supportsEvaluateForHovers":false,"supportsConditionalBreakpoints":true,"supportsConfigurationDoneRequest":true,"supportsFunctionBreakpoints":false,"supportsSetVariable":true,"exceptionBreakpointFilters":[{"label":"All Exceptions","filter":"all"},{"label":"Uncaught Exceptions","filter":"uncaught"}]}}
To client: {"seq":0,"type":"event","event":"initialized"}
From client: launch({"name":"Python: Current File","type":"python","request":"launch","program":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/test.py","logToFile":true,"pythonPath":"/usr/local/bin/python3","cwd":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin","envFile":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/.env","stopOnEntry":false,"console":"integratedTerminal","internalConsoleOptions":"neverOpen","debugOptions":["RedirectOutput"],"__sessionId":"ff36a663-e1e8-4549-b52c-bcc8fe7648d8"})
To client: {"seq":0,"type":"event","event":"output","body":{"category":"telemetry","output":"DEBUGGER","data":{"trigger":"launch","console":"integratedTerminal","debugOptions":"RedirectOutput","pyspark":false}}}
From client: setExceptionBreakpoints({"filters":[]})
To client: "runInTerminal"({"kind":"integrated","title":"Python Debug Console","cwd":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin","args":["/usr/local/bin/python3","/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/PythonTools/visualstudio_py_launcher.py","/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin","62788","34806ad9-833a-4524-8cd6-18ca4aa74f14","RedirectOutput,RedirectOutput","/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/test.py"],"env":{"PYTHONIOENCODING":"UTF-8","PYTHONUNBUFFERED":"1"}}), timeout: 5000

type: pythonExperimental

• No errors in the console window
• terminal errors:

warning: Debugger speedups using cython not found. Run '"/usr/local/opt/python/bin/python3.6" "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/experimental/ptvsd/ptvsd/pydevd/setup_cython.py" build_ext --inplace' to build.
pydev debugger: starting

Could not connect to localhost: 62775
Traceback (most recent call last):
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/experimental/ptvsd/ptvsd/pydevd/pydevd.py", line 1620, in main
    debugger.connect(host, port)
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/experimental/ptvsd/ptvsd/pydevd/pydevd.py", line 324, in connect
    s = start_client(host, port)
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/experimental/ptvsd/ptvsd/pydevd_hooks.py", line 56, in <lambda>
    _start_client = (lambda h, p: start_client(daemon, h, p))
  File "/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/experimental/ptvsd/ptvsd/pydevd_hooks.py", line 34, in start_client    client.connect((host, port))
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

• experimental_debug.log contents

1:47:05 PM, 6/4/2018
Started @ Mon Jun 04 2018 13:47:05 GMT-0700 (PDT)
From Client:
Content-Length: 325

{"command":"initialize","arguments":{"clientID":"vscode","clientName":"Visual Studio Code","adapterID":"pythonExperimental","pathFormat":"path","linesStartAt1":true,"columnsStartAt1":true,"supportsVariableType":true,"supportsVariablePaging":true,"supportsRunInTerminalRequest":true,"locale":"en-us"},"type":"request","seq":1}
To Client:
Content-Length: 621

{"seq":1,"type":"response","request_seq":1,"command":"initialize","success":true,"body":{"supportsExceptionInfoRequest":true,"supportsConfigurationDoneRequest":true,"supportsConditionalBreakpoints":true,"supportsSetVariable":true,"supportsExceptionOptions":true,"supportsEvaluateForHovers":true,"supportsModulesRequest":true,"supportsValueFormattingOptions":true,"supportsHitConditionalBreakpoints":true,"supportsSetExpression":true,"supportsLogPoints":true,"exceptionBreakpointFilters":[{"filter":"raised","label":"Raised Exceptions","default":false},{"filter":"uncaught","label":"Uncaught Exceptions","default":true}]}}
From Client:
Content-Length: 648

{"command":"launch","arguments":{"name":"Python: Current File","type":"pythonExperimental","request":"launch","program":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/test.py","logToFile":true,"pythonPath":"/usr/local/bin/python3","cwd":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin","envFile":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/.env","stopOnEntry":false,"console":"integratedTerminal","internalConsoleOptions":"neverOpen","debugOptions":["RedirectOutput"],"__sessionId":"fd9b6f96-4324-4372-919c-2603b30c46f0"},"type":"request","seq":2}
To Client:
Content-Length: 554

{"command":"runInTerminal","arguments":{"kind":"integrated","title":"Python Debug Console","cwd":"/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin","args":["/usr/local/bin/python3","-m","ptvsd","--host","localhost","--port","62879","/Users/noahcowan-maccallum/Code/go/src/github.com/goforward/sample-repos/nonin/test.py"],"env":{"PYTHONIOENCODING":"UTF-8","PYTHONUNBUFFERED":"1","PYTHONPATH":"/Users/noahcowan-maccallum/.vscode/extensions/ms-python.python-2018.4.0/pythonFiles/experimental/ptvsd"}},"type":"request","seq":2}
From Client:
Content-Length: 94

{"type":"response","seq":3,"command":"runInTerminal","request_seq":2,"success":true,"body":{}}

[DonJayamanne]

• Looks like something is preventing a connection to a socket server created for debugging.
  Please could you try running the following command in the VS Code terminal python -m http.server -b localhost 62775
• Please check whether you're able to connect to this server.
• If that works, please could you try the following:
  • Open an empty folder in VS Code
  • Create a python file named one.py with the line print("Hello World") in it.
  • Create a virtual environment and pip install ptvsd --pre into that new environment
  • Run the command python -m ptvsd --server --port 62775 --file one.py in the virtual env.
  • Open VS Code go into file .vscode/launch.json and add the following in there:

        {
            "name": "Attach (Remote Debug)",
            "type": "pythonExperimental",
            "request": "attach",
            "port": 62775,
            "host": "localhost"
        },

* Open the file `one.py` in VS Code and add a breakpoint to the first line.
* Next go into the debug menu and select the above debug configuration and attach the debugger.

[noahmacca]

Thanks for your ongoing help.

• With python2 (standard python) command the command ran with no return value.
• With python3 I get the same socket.gaierror: [Errno 8] nodename nor servname provided, or not known
• With pipenv shell -> python -m http.server -b localhost 62775 I again get socket.gaierror: [Errno 8] nodename nor servname provided, or not known
  • Pipenv python is my 'selected interpreter' for this project

[DonJayamanne]

Well, it looks like you have something else wrong with your Mac or python installations. Right now, the issues you are having are not related to the python extension.
My suggestion is you reach out to the community in stack overflow to try and resolve this issue (of not being able to run a simple server)

Closing as this is not related to the extension, but an issue with the environment.