Unite buffer does not play well with <C-I> / <C-O>

[yannack]

• Summary : Unite buffer sometimes appears when using <C-O> and then stays in the list of open buffers, even if closed using :UniteClose .
• Expected: Unite buffer should only reappear using :UniteResume ,not when scrolling back using <C-O>. Also the behaviour is not consistent : sometimes <C-O> skips to the previous buffer directly, sometimes it shows the intermediate :Unite used.
• Environment.
  • GNU/Linux
  • Distro : Ubuntu 14.04 64 bits
  • Vim : 7.4.052
• Minimal vimrc less than 50 lines

set nocompatible
filetype off                   " required for Vundle
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'gmarik/Vundle.vim'
Plugin 'Shougo/unite.vim'
call vundle#end()            " required
set laststatus=2
let mapleader="\<Space>"
syntax on
set number
set hlsearch
set cursorline
set autowrite       " Automatically save before commands like :next and :make
set hidden      " Hide buffers when they are abandoned

" Unite settings
silent! call unite#filters#matcher_default#use(['matcher_fuzzy'])
silent! call unite#filters#sorter_default#use(['sorter_rank'])
nnoremap <leader>b :Unite buffer -buffer-name=buffers -no-split <CR>
autocmd FileType unite call s:unite_settings()
function! s:unite_settings()
  " Quit unite on backspace from normal mode, or using leader-q
  nnoremap <buffer> <BS> :UniteClose<CR>
  nnoremap <buffer> <leader>q :UniteClose<CR>
endfunction

• Reproducible way, from Vim's start:
  1. cd /tmp
  2. vi test1.c test2.c test3.c
  3. type some stuff in test1.c
  4. using :Unite buffer , go to test2.c
  5. type some stuff in test2.c
  6. using :Unite buffer , go to test3.c
  7. type some stuff in test3.c
  8. type <C-O> -> moves back to test2.c (this is OK)
  9. type <C-O> -> should move back to test1.c, but opens a Unite buffer (the one with the buffers). A few more <C-o> will go to test1.c but the behaviour is not consistent.
• Side issues
  • Also, in stage 7. , the Unite buffer does not really disappear anymore (whether selecting a buffer, doing <C-o> or using :UniteClose) , it is still in the list of open buffers (using :ls lists it as a buffer).
  • <C-I> is remapped by Unite, so if you <C-O> into unite, there is no way to move forward...

[Shougo]

Unfortunatelly, I cannot fix it. You should use Unite jump.

Please see the issue. https://github.com/Shougo/unite.vim/issues/278

[yannack]

OK I understand. Thanks for the link, using the -wipe option is actually a workable solution for me in most cases. I could not find much documentation about :Unite jump, but it also looks interesting. I am pretty sure we could remap <C-O> and <C-i> using :Unite jump, but for now, the -wipe is enough. Thanks, @Shougo !