Redraw issues

[ootoovak]

OSX 10.11.6
neovim-dot-app-HEAD-68cf699

Sometimes when Neovim is open (editing Ruby, ERB templates, and terminals running servers) the tab with the Ruby code becomes unresponsive. Even once it becomes (semi-)responsive again the redraw is often laggy or broken completely.

init.vim file if any of these plugins or settings might be causing the issue:

call plug#begin('~/.config/nvim/plugged')

" Some comunity Vim defaults
Plug 'tpope/vim-sensible'

" Add nicer terminal buffer keybindings
Plug 'mklabs/split-term.vim'

" A file and folder explorer
Plug 'scrooloose/nerdtree', { 'on':  'NERDTreeToggle' }

" Show Git statuses in the nerdtree file explorer
Plug 'Xuyuanp/nerdtree-git-plugin'

" For code autocompletion
Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }

" A command line fuzzy string matcher
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'

" A status-line plugin
Plug 'itchyny/lightline.vim'

" A colour theme
Plug 'MaxSt/FlatColor'

" Highlight trailing whitespace
Plug 'ntpeters/vim-better-whitespace'

" Show changes that Git tracks in the vim lefthand gutter
Plug 'airblade/vim-gitgutter'

" Elm language plugin
Plug 'ElmCast/elm-vim'

" Elixir language plugins
Plug 'elixir-lang/vim-elixir' | Plug 'slashmili/alchemist.vim'

" Add Git commands
Plug 'tpope/vim-fugitive'

" Add the end keyword automatically in Ruby
Plug 'tpope/vim-endwise'

call plug#end()


" >----- split-term.vim -----

" Allow hitting <Esc> to switch to normal mode
tnoremap <Esc> <C-\><C-n>

tnoremap <A-h> <C-\><C-n><C-w>h
tnoremap <A-j> <C-\><C-n><C-w>j
tnoremap <A-k> <C-\><C-n><C-w>k
tnoremap <A-l> <C-\><C-n><C-w>l
nnoremap <A-h> <C-w>h
nnoremap <A-j> <C-w>j
nnoremap <A-k> <C-w>k
nnoremap <A-l> <C-w>l

noremap <leader>th :Term<cr>
noremap <leader>tv :VTerm<cr>

set splitright
set splitbelow

" <----- split-term.vim -----


" >----- fzf -----

" Make it show up the same way as Ctl-P
nnoremap <c-p> :FZF<cr>

" <----- fzf -----


" >----- elm-vim -----

" Format Elm code automatically on save
let g:elm_format_autosave = 1

" <----- elm-vim -----


" >----- FlatColor -----

" Enable true colours
let $NVIM_TUI_ENABLE_TRUE_COLOR=1

" Use the same colour scheme with the lightline.vim plugin
let g:lightline = { 'colorscheme': 'flatcolor' }

" Use the flat color theme
colorscheme flatcolor

" <----- FlatColor -----


" >----- nerdtree -----

" Open up the folder drawer
map <C-n> :NERDTreeToggle<CR>

" Also allow using a leader n to open the drawer
noremap <leader>n :NERDTreeToggle<cr>

" Quit vim if only the drawer is left open
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

" <----- nerdtree -----


" >----- deoplete.nvim -----

" Turn on deoplete at startup
let g:deoplete#enable_at_startup = 1

" Auto select the first result, then Enter to autocomplete
set completeopt+=noinsert

" <----- deoplete.nvim -----


" >----- GENERAL -----

" Change the key that starts Vim commands
let mapleader = "\<Space>"

" Save a file easly
nnoremap <Leader>w :w<CR>

" Split Vim vertically or horizontally with the greatest of ease
noremap <leader>v :vsp<cr>
noremap <leader>h :sp<cr>

set number              " Show the line numbers on the left side.
set showmatch           " Show matching brackets.
set expandtab           " Insert spaces when TAB is pressed.
set tabstop=2           " Render TABs using this many spaces.
set shiftwidth=2        " Indentation amount for < and > commands.

" Show a line indicator at 120 characters width
set colorcolumn=120
highlight ColorColumn ctermbg=0 guibg=grey

" Use a custom cursor color in terminal mode
highlight TermCursor ctermfg=green guifg=green

" Add true colours in the terminal
set termguicolors

" Make those debugger statements painfully obvious
au BufEnter *.rb syn match error contained "\<puts\>"
au BufEnter *.rb syn match error contained "\<save_and_open_page\>"
au BufEnter *.rb syn match error contained "\<binding.pry\>"
au BufEnter *.rb syn match error contained "\<debugger\>"
au BufEnter *.js syn match error contained "\<console\>"
au BufEnter *.js syn match error contained "\<debugger\>"

" <----- GENERAL ——

[ootoovak]

Using FZF can sometimes cause redraw issues as well.

[ootoovak]

Caught this in my Console logs during some redraw (and UI responsiveness issues):

26/09/16 12:04:37.757 PM Neovim[392]: *** -[__NSCFString stringByAppendingString:]: nil argument

26/09/16 12:04:37.760 PM Neovim[392]: (
    0   CoreFoundation                      0x00007fff8d0704f2 __exceptionPreprocess + 178
    1   libobjc.A.dylib                     0x00007fff8c26af7e objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff8d0d74bd +[NSException raise:format:] + 205
    3   Foundation                          0x00007fff97d2bfc7 -[NSString stringByAppendingString:] + 96
    4   Neovim                              0x000000010e522c16 -[VimView(Redraw) doAction:withItem:] + 2134
    5   Neovim                              0x000000010e52231a -[VimView(Redraw) redraw:] + 634
    6   Neovim                              0x000000010e531923 -[VimWindow notified:withData:] + 227
    7   Neovim                              0x000000010e534b01 -[VimWindow handleEvent:] + 593
    8   Foundation                          0x00007fff97d6efde __NSThreadPerformPerform + 279
    9   CoreFoundation                      0x00007fff8d005881 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    10  CoreFoundation                      0x00007fff8cfe4fbc __CFRunLoopDoSources0 + 556
    11  CoreFoundation                      0x00007fff8cfe44df __CFRunLoopRun + 927
    12  CoreFoundation                      0x00007fff8cfe3ed8 CFRunLoopRunSpecific + 296
    13  HIToolbox                           0x00007fff9211a935 RunCurrentEventLoopInMode + 235
    14  HIToolbox                           0x00007fff9211a76f ReceiveNextEventCommon + 432
    15  HIToolbox                           0x00007fff9211a5af _BlockUntilNextEventMatchingListInModeWithFilter + 71
    16  AppKit                              0x00007fff9af9cdf6 _DPSNextEvent + 1067
    17  AppKit                              0x00007fff9af9c226 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
    18  AppKit                              0x00007fff9af90d80 -[NSApplication run] + 682
    19  Neovim                              0x000000010e51619a main + 186
    20  libdyld.dylib                       0x00007fff9fea75ad start + 1
)

[fsegouin]

Same issue here.. :(