organizeImports duplicates and removes code (destroys syntax)

[Spenhouet]

Two issues:

• Unstable / inconsistent formatting - Formatting changes with every save
• Removes or duplicates code - Destroys code base and syntax

Steps to Reproduce:

1. Use the following setting:

{
    "[python]": {
        "editor.codeActionsOnSave": {
            "source.organizeImports": true,
        }
    }
}

2. Open a python file
3. Enter the following import

from utils.python_utils import (CaseInsensitiveDict, CaseInsensitiveKey, CaseInsensitiveSet,
                                UpperLowerBound)

4. Press save

Result

You will either get this (duplicated and destroyed code):

from utils.python_utils import (CaseInsensitiveDict, CaseInsensitiveKey,
                                CaseInsensitiveSet, UpperLowerBound)
    UpperLowerBound)

or that:

from utils.python_utils import (CaseInsensitiveDict, CaseInsensitiveKey,
                                CaseInsensitiveSet, UpperLowerBound)  

Expected Result

Nothing changes.
No imports need to be sorted. Everything is sorted.
The import was already formatted correctly.

This is really bad. If this happens the first time, saving a second time will be very destructive to your code. It will start duplicating and deleting other lines in your file.

Environment:

• VSCode Version: 1.41.1
• OS Version: Windows 10 (build 1909)

[vscodebot]

This issue is caused by an extension, please file it with the repository (or contact) the extension has linked in its overview in VS Code or the marketplace for VS Code. See also our issue reporting guidelines.

Happy Coding!

[eamodio]

Please open an issue for the Python extension.

[Spenhouet]

Thanks for the redirect. I opened an issue here: microsoft/vscode-python#9889