completion returns wrong and according to the spec invalid results

[max397574]

How are you using the lua-language-server?

NeoVim

Which OS are you using?

MacOS

What is the issue affecting?

Completion

Expected Behaviour

Get back a completion item which does nothing which is explicitly forbidden in the spec and actually is correct

Actual Behaviour

Returns a completion item with a textEdit which makes no sense and additionalTextEdits which wouldn't even be allowed by the spec

Reproduction steps

I completed with the following context (notice that the cursor position uses different based indexing because neovim being like it is)

local entry_context = {
    bufnr = 1,
    cursor = { col = 35, row = 1 },
    line = "    completion_item.textEdit.range.",
    line_before_cursor = "    completion_item.textEdit.range.",
    previous = nil,
    reason = 1,
}

I get back an entry like this

local completion_item = {
    additionalTextEdits = {
        {
            newText = "",
            range = {
                ["end"] = { character = 35, line = 69 },
                start = { character = 34, line = 69 },
            },
        },
    },
    data = { id = 119, uri = "not relevant" },
    detail = "lsp.Position",
    documentation = { kind = "markdown", value = "not relevant" },
    insertTextFormat = 2,
    kind = 5,
    label = '"end"',
    sortText = "0001",
    textEdit = {
        newText = '["end"]',
        range = {
            ["end"] = { character = 35, line = 69 },
            start = { character = 4, line = 71 },
        },
    },
}

Additional Notes

I have no idea why the text edit would modify 3 different lines when just a single statement would have to be inserted. About additionalTextEdits from the lsp specification:

/** * An optional array of additional text edits that are applied when * selecting this completion. Edits must not overlap (including the same * insert position) with the main edit nor with themselves. * * Additional text edits should be used to change text unrelated to the * current cursor position (for example adding an import statement at the * top of the file if the completion item will insert an unqualified type). */

In this case the additionalTextEdit overlaps with the edit and also doesn't what's it intended for (2nd paragraph)

Log File

No response