PreLaunchTask correctly waits for background task to wait for client connection, then fails with vague popuop

Bắt đầu với các cấu hình launch.json và tasks.json trong báo cáo, sau đó tái hiện luồng bằng pants test --debug-adapter ${file} và preLaunchTask của VS Code. Kiểm tra problem matcher của tác vụ nền và popup kết quả. Hoàn tất khi preLaunchTask chờ theo đúng cấu hình và debugpy gắn vào cấu hình từ xa.

Environment data

• debugpy version: 1.8.6
• OS and version: MacOS (ARM) 14.6.1
• Python version: 3.10.6
• Using VS Code or Visual Studio: VS Code

Actual behavior

I'm using Pants to run python tests. The program behaves as expected (starts the test with pdb and waits for client connection):

➜  pants test --debug-adapter example_test.py
12:16:25.45 [INFO] Launching debug adapter at '127.0.0.1:5678', which will wait for a client connection...

I would like to use a launch configuration with a preLaunchTask to make debugging easy. However, VS Code does not behave as expected with the background task. I have tried seemingly every possible combination of isBackground, problemMatcher.background, and other fields. Below is what I believe should work according to documentation. When the "Pants: Debug Test" launch configuration is triggered, it calls the correct shell command and correctly waits for the "Launching debug adapter" endPattern to be printed, but then fails with a vague popup

launch.json:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Pants: Debug Test",
      "preLaunchTask": "Pants Debug Test (Current File)",
      "type": "debugpy",
      "request": "attach",
      "pathMappings": [
        {
          "localRoot": "${workspaceFolder}",
          "remoteRoot": "."
        }
      ],
      "connect": {
        "host": "localhost",
        "port": 5678
      }
    }
  ]
}

tasks.json:

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Pants Debug Test (Current File)",
      "type": "shell",
      "command": "pants test --debug-adapter ${file} ",
      "group": "test",
      "presentation": {
        "echo": true,
        "reveal": "always",
        "focus": false,
        "panel": "shared",
        "showReuseMessage": false,
        "clear": true
      },
      "isBackground": true,
      "problemMatcher": {
        "owner": "pants",
        "source": "pytest",
        "fileLocation": "relative",
        "background": {
          "activeOnStart": true,
          "beginsPattern": ".",
          "endsPattern": ".*Launching debug adapter.*",
        },
        "pattern": [
          {
            "regexp": ".",
            "file": 1,
            "location": 2,
            "message": 3
          }
        ]
      }
    }
  ]
}

Expected behavior

PreLaunchTask to run, and debugpy to attach to remote configuraiton

Steps to reproduce:

Above launch.json/task.json and a sample pants project