Strange error with NeoVim

[SX91]

When trying to use NERDTreeFind for the second time on empty buffer, NERDTree throws an error:
Error detected while processing function ToggleFindNerd..<SNR>53_findAndRevealPath..209: line 2: E121: Undefined variable: root E15: Invalid expression: getbufvar(t:NERDTreeBufName, 'NERDTree').root Error detected while processing function ToggleFindNerd..<SNR>53_findAndRevealPath: line 27: E121: Undefined variable: path E116: Invalid arguments for function 123 E15: Invalid expression: !p.isUnder(g:NERDTreeFileNode.GetRootForTab().path) Error detected while processing function ToggleFindNerd..<SNR>53_findAndRevealPath..306..316: line 2: E605: Exception not caught: NERDTree.TreeNotOpen Error detected while processing function ToggleFindNerd: line 4: E171: Missing :endif"

And there's some other strange error:
Error detected while processing function ToggleFindNerd..<SNR>53_findAndRevealPath: line 33: E716: Key not present in Dictionary: setShowHidden
It happens if I run :NERDTree and then :NERDTreeToggle, :NERDTreeFind.

vimrc: https://github.com/begriffs/haskell-vim-now/blob/master/.vimrc

[SX91]

Steps to reproduce:

• Open nvim
• :NERDTreeFind
• :NERDTreeToggle
• :NERDTreeFind

[SX91]

It was NeoVim bug. It saved unlisted buffers with viminfo^=%.