Error detected while processing function <SNR>42_EnableAirlineColorNum[10]..<SNR>42_LoadCursorLineNrUpdates[6]..UpdateCursorLineNr:

[shibumi]

Hey,
I run into a lot of errors when I do: EnableAirlineColornum

Error detected while processing function <SNR>42_EnableAirlineColorNum[10]..<SNR>42_LoadCursorLineNrUpdates[6]..UpdateCursorLineNr:
line   30:
E121: Undefined variable: g:colors_name
E15: Invalid expression: g:colors_name

[ntpeters]

Which colorscheme are you using? The variable g:colors_name should be defined by any colorscheme other than the default. If you aren't using the default, then this means the colorscheme you are using is malformed.

Either way, I do need to add a check for this.

[shibumi]

I use the default vim-airline colourscheme..

[ntpeters]

Ah, okay. Before looking into this issue I didn't realize the default theme doesn't set that variable.

Until I fix this, a temporary workaround would be to set that in your vimrc: let g:colors_name='default'

The scheme name is mainly used to ensure a refresh if the colorscheme is changed (and to ignore change events when changing to the same theme), so this should be sufficient for now.