Tab rename or tab new not working - Attempt to index a number value

[asmodeus812]

For some reason, when using tabline with only tab capabilities i am unable to make it properly create a new tab with a specified name and / or rename existing tab

    enable = false,
    options = {
        show_bufnr = false,
        show_tabs_only = true,
        show_devicons = true,
        modified_italic = true,
        show_tabs_always = false,
        show_filename_only = true,
    }
}

After executing :TablineTabNew somename. Exact same issue with rename. Looking through the source code, it seems that for some reason it does tonumber(name) and then does an index access on that number, which makes no sense.

[badosu]

I notice the same error when closing a tab between two others typing <c-w><c-q>.

To reproduce:

Configure with show_tabs_only = true, start a session and:

:tabnew
:tabnew
:tabnew
gT
<c-w><c-q> (control-w followed by control-q) (or simply :q)

[shved]

Same error. Now I know how to reproduce it ^_^ The only setting I have for tabline is show_tabs_only = true. Neovim version 0.8.3, hash of the tabline commit being used 5d76dc8616b4b7b892229cc05cd0f4cd0200077a