Debug: Compound - Python / Attach C Process doesn't work

Type: Debugger

Describe the bug

• OS and Version: Windows 1909
• VS Code Version: 1.48-insder
• C/C++ Extension Version: v0.29.0
• Other extensions you installed: Python extension

To Reproduce

1. Open folder in VS Code
2. Create a new python file:

print("hello world")

3. Add launch.json config:

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [

        {
            "name": "C: Attach to Process",
            "type": "cppvsdbg",
            "request": "attach",
            "processId": "${command:pickProcess}",
            "visualizerFile": ""
        },
        {
            "name":"Python: Current File",
            "type":"python",
            "request":"launch",
            "program":"${file}",
            "console":"integratedTerminal",
            "stopOnEntry": true
        },
    ],
    "compounds":
    [
        {
          "name": "C: Current Python File",
          "configurations": ["Python: Current File", "C: Attach to Process"],
        },
    ]
}

4. Select the compound launch in the debugger and start it (F5)
5. See the error Message

When you launch the python and c launch task separately it works:

Root Issue:
https://github.com/microsoft/vscode/issues/104174

Start by reproducing the compound launch from the provided launch.json on the listed Windows, VS Code, and C/C++ extension versions. Read the linked VS Code issue 104174 alongside the six comments; done means the Python and C attach configurations launch together successfully through the compound configuration.