Error when mapping action to <backspace>

[heynemann]

Describe the bug

When adding action to call a function when <backspace> is pressed. I get an error:

Error detected while processing function nnn#select_action:
line    6:
E728: Using a Dictionary as a Number

To Reproduce

Add this config on top of nnn.vim:

function! QuitNNN()
    execute('normal! q')
endfunction

let g:nnn#action = { '<backspace>': funcref('QuitNNN') }

1. Open vim
2. Press key n
3. Press key
4. See error

Expected behavior

Should call my function (and in turn close explorer).

Environment:

• OS: macos
• Terminal: iterm2
• Shell: zsh
• Vim version: vim 8
• Plugin manager: vim-plug
• Plugin version: master
• Nnn version: latest on brew

[heynemann]

The problem seems to be related to explorer as using nnn#pick it works.

[heynemann]

It works now with any <c- key, but not with or . (and not in explorer, only in pick)

[mcchrish]

I can reproduce the problem. However, I would suggest an alternative (better) way to achieve the behavior you want:

autocmd FileType nnn tnoremap <buffer><silent> <backspace> q

Or place the mapping in ftplugin/nnn.vim.

A problem though with mapping backspace with q is that, backspace will not work as intended in moments like entering texts in renaming files/new file name etc.