"Invalid message: "pythonPath" is not valid if "python" is specified" when running FastAPI in debug container

[thomasmartinhudson]

Type: Bug

Behaviour

Expected vs. Actual

Cannot start Python debug container from VSCode version 1.75+ (Works fine in 1.74) on Ubuntu 20.04

Steps to reproduce:

1. Create task:

        {
            "name": "A debug task in docker container",
            "type": "docker",
            "request": "launch",
            "preLaunchTask": "docker-run: task to spin up fastAPI server in container",
            "python": {
                "pathMappings": [
                    {
                        "localRoot": "${workspaceFolder}/backend/application",
                        "remoteRoot": "/application"
                    }
                ],
                "projectType": "fastapi"
            },
            "containerName": "fast-api-container",
            "removeContainerAfterDebug": true,
        },

3. Run debug task
4. Error trying to couple Python to container pythonPath:
   

Diagnostic data

• Python version (& distribution if applicable, e.g. Anaconda): 3.11.2
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Poetry
• Value of the python.languageServer setting: Pylance

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

XXX

User Settings

envFile: "<placeholder>"

poetryPath: "<placeholder>"

languageServer: "Pylance"

linting
• mypyArgs: "<placeholder>"
• mypyEnabled: true

formatting
• provider: "black"
• blackArgs: "<placeholder>"

testing
• pytestArgs: "<placeholder>"
• pytestEnabled: true

Extension version: 2022.20.1
VS Code version: Code 1.74.3 (97dec172d3256f8ca4bfb2143f3f76b503ca0534, 2023-01-09T16:57:40.428Z)
OS version: Linux x64 5.15.0-67-generic
Modes:
Sandboxed: No

System Info

Item	Value
CPUs	11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz (16 x 2300)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: disabled_software video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	1, 1, 1
Memory (System)	31.08GB (22.99GB free)
Process Argv	9fin/9admin/ --crash-reporter-id 1839f185-4d00-41f5-9c93-6163766b458d
Screen Reader	no
VM	0%
DESKTOP_SESSION	ubuntu
XDG_CURRENT_DESKTOP	Unity
XDG_SESSION_DESKTOP	ubuntu
XDG_SESSION_TYPE	x11

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vslsvsres303:30308271
pythonvspyl392:30443607
vserr242:30382549
pythontb:30283811
vsjup518:30340749
pythonptprofiler:30281270
vsdfh931:30280409
vshan820:30294714
vstes263cf:30335440
pythondataviewer:30285071
vscod805cf:30301675
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
cmake_vspar411:30581797
vsaa593:30376534
pythonvs932:30410667
cppdebug:30492333
vsclangdc:30486549
c4g48928:30535728
dsvsc012cf:30540253
azure-dev_surveyone:30548225
vscccc:30610679
pyindex848:30662994
nodejswelcome1:30587005
2e4cg342:30602488
pyind779:30671433
89544117:30613380
pythonsymbol12:30671437
6233i204:30672705

[karthiknadig]

Duplicate of #20655

Please try the pre-release version of the python extension this is fixed.