Nerdtree: Undefined variable: v:t_func

[pohaosu]

Self-Diagnosis

• [x] I have searched the issues for an answer to my question.
• [x] I have reviewed the NERDTree documentation. :h NERDTree
• [x] I have reviewed the Wiki.
• [x] I have searched the web for an answer to my question.

Environment (for bug reports)

• [x] Operating System: Linux
• [x] Vim/Neovim version :echo v:version: 704
• [x] NERDTree version, found on 1st line in NERDTree quickhelp ?: 6.4.0
• [x] vimrc settings
  
  
  
  • [ ] NERDTree variables
    
    vim
  
  
  • Other NERDTree-dependent Plugins
    
    
    
    
    
    • [ ] jistr/vim-nerdtree-tabs
    
    
    
    • [ ] ryanoasis/vim-devicons
    
    
    
    • [ ] tiagofumo/vim-nerdtree-syntax-highlight
    
    
    
    • [ ] Xuyuanp/nerdtree-git-plugin
    
    
    
    • [ ] Others (specify):
    
    
    
  
  
  • [x] I've verified the issue occurs with only NERDTree installed.
  
  

Steps to Reproduce the Issue

1. Trigger any key in NerdTree

Current Result (Include screenshots where appropriate.)

Expected Result

map key should work

Possible solution

Change key_map.vim: 69 to the following for backward compatibility

let Callback = type (self.callback) == type (function ("tr"))? self.callback: function (self.callback)

[PhilRunninger]

Fixed in c962796b030f39db596fde5048464e57c2c6ca8d. Thanks for catching that.