Nerdtree: E704 when opening nerdtree or new directory

[Coleej]

With the newest commit, when I toggle Nerdtree or navigate to a new directory, Vim throws this error:

E704: Funcref variable name must start with a capital: l:numChildrenCached

The directory is not populated with any other nodes. I reverted back to commit: '288669db1fa888947deaf715d7469233f476909f' and the problem disappeared.

Environment

• Operating System: Linux, both ubuntu 18.04 (4.18 kernel) and Arch (5.0.4 kernel)

• Vim version :version:
  VIM - Vi IMproved 8.1 (2018 May 18, compiled Nov 26 2018 20:52:35) Included patches: 1-547 Compiled by cjohnson@mobile Huge version with GTK2-GNOME GUI. Features included (+) or not (-): +acl +clientserver +diff +folding +libcall -mouse_gpm +packages -ruby +termguicolors +visual +xsmp_interact +arabic +clipboard +digraphs -footer +linebreak -mouse_jsbterm +path_extra +scrollbind +terminal +visualextra +xterm_clipboard +autocmd +cmdline_compl +dnd +fork() +lispindent +mouse_netterm -perl +signs +terminfo +viminfo -xterm_save +autochdir +cmdline_hist -ebcdic +gettext +listcmds +mouse_sgr +persistent_undo +smartindent +termresponse +vreplace +autoservername +cmdline_info +emacs_tags -hangul_input +localmap -mouse_sysmouse +postscript +startuptime +textobjects +wildignore +balloon_eval +comments +eval +iconv -lua +mouse_urxvt +printer +statusline +timers +wildmenu +balloon_eval_term +conceal +ex_extra +insert_expand +menu +mouse_xterm +profile -sun_workshop +title +windows +browse +cryptv +extra_search +job +mksession +multi_byte -python +syntax +toolbar +writebackup ++builtin_terms +cscope +farsi +jumplist +modify_fname +multi_lang +python3/dyn +tag_binary +user_commands +X11 +byte_offset +cursorbind +file_in_path +keymap +mouse -mzscheme +quickfix +tag_old_static +vartabs -xfontset +channel +cursorshape +find_in_path +lambda +mouseshape +netbeans_intg +reltime -tag_any_white +vertsplit +xim +cindent +dialog_con_gui +float +langmap +mouse_dec +num64 +rightleft -tcl +virtualedit +xpm system vimrc file: "$VIM/vimrc" user vimrc file: "$HOME/.vimrc" 2nd user vimrc file: "~/.vim/vimrc" user exrc file: "$HOME/.exrc" system gvimrc file: "$VIM/gvimrc" user gvimrc file: "$HOME/.gvimrc" 2nd user gvimrc file: "~/.vim/gvimrc" defaults file: "$VIMRUNTIME/defaults.vim" system menu file: "$VIMRUNTIME/menu.vim" fall-back for $VIM: "/usr/local/stow/vim81-0547/share/vim" Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -pthread -I/usr/include/gtk-2.0 -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/gio-unix-2.0/ -I/usr/include/cairo -I/usr/include/pango-1. 0 -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/ glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/freetype2 -I/usr/include/libpng16 -D_REENTRANT -DORBIT2=1 -pthread -I/usr/include/libgnomeui-2. 0 -I/usr/include/gnome-keyring-1 -I/usr/include/libbonoboui-2.0 -I/usr/include/libxml2 -I/usr/include/libgnome-2.0 -I/usr/include/libbonobo-2.0 -I/usr/include/bonobo-activation-2.0 -I/usr/include/orbit-2.0 -I/usr/ include/libgnomecanvas-2.0 -I/usr/include/gail-1.0 -I/usr/include/libart-2.0 -I/usr/include/gtk-2.0 -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/gio-unix-2.0/ -I/usr/include/cairo -I/usr/include/pang o-1.0 -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/f reetype2 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/gnome-vfs-2.0 -I/usr/lib/x86_64-linux-gnu/gnome-vfs-2.0/include -I/usr/include/gconf/2 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -O3 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 Linking: gcc -L/usr/local/lib -Wl,--as-needed -o vim -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig - lfreetype -lgnomeui-2 -lSM -lICE -lbonoboui-2 -lgnome-2 -lpopt -lbonobo-2 -lbonobo-activation -lORBit-2 -lgnomecanvas-2 -lart_lgpl_2 -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgio-2.0 -lpang oft2-1.0 -lpango-1.0 -lfontconfig -lfreetype -lgdk_pixbuf-2.0 -lgnomevfs-2 -lgconf-2 -lgthread-2.0 -lgmodule-2.0 -lgobject-2.0 -lglib-2.0 -lSM -lICE -lXpm -lXt -lX11 -lXdmcp -lSM -lICE -lm -ltinfo -lnsl -lselinu x -ldl

• NERDTree version git rev-parse --short HEAD: 0efbdfb

• NERDTree settings applied in your vimrc, if any:
  ```" << NERDTree >> {{{

let g:NERDTreeWinSize = 52
au bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif
" function to open NERDTree depending on filetype
"au vimenter * call s:CheckToOpenNERDTree()

function! s:CheckToOpenNERDTree() abort

" Open for python
if &filetype == 'python'
    NERDTree
endif

" Open for c
if &filetype == 'c'
    NERDTree
endif

endfunction

" user NERDTree when opening directory
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists("s:std_in") | exe 'NERDTree' argv()[0] | wincmd p | ene | endif

" }}}```

Process

1. open nerdtree or navigate to new directory

Current Result

error is thrown and no nodes are loaded into the tree

Expected Result

navigate directory tree

Screenshot(s)

Possible Fix

revert to commit '288669db1fa888947deaf715d7469233f476909f'

[terryding77]

I meet the same problem and simply add a pair of brackets to _initChildren func, I resolve it.

[robinchm]

Also encountered the exactly same issue and reverting to previous commit "288669d" indeed works.

[PhilRunninger]

Fixed by PR #969. Thanks, @terryding77 .