Do not delete the close pair on <BS> when opening a file by nerdtree

[drchen00]

This is my test log
delimitMate Report

* Options: ( ) default, (g) global, (b) buffer

( ) delimitMate_apostrophes = ''
( ) delimitMate_apostrophes_list = []
( ) delimitMate_autoclose = 1
( ) delimitMate_balance_matchpairs = 0
( ) delimitMate_eol_marker = ''
( ) delimitMate_excluded_regions = 'Comment'
( ) delimitMate_excluded_regions_enabled = 1
( ) delimitMate_excluded_regions_list = ['Comment']
(g) delimitMate_expand_cr = 1
( ) delimitMate_expand_inside_quotes = 0
( ) delimitMate_expand_space = 0
( ) delimitMate_insert_eol_marker = 1
(g) delimitMate_jump_expansion = 1
( ) delimitMate_left_delims = ['(', '{', '[']
( ) delimitMate_matchpairs = '(:),{:},[:]'
( ) delimitMate_matchpairs_list = [['(', ')'], ['{', '}'], ['[', ']']]
(b) delimitMate_nesting_quotes = ['"']
( ) delimitMate_quotes = '" '' `'
( ) delimitMate_quotes_list = ['"', '''', '`']
( ) delimitMate_right_delims = [')', '}', ']']
( ) delimitMate_smart_matchpairs = '^\%(\w\|\!\|[£$]\|[^[:punct:][:space:]]\)'
( ) delimitMate_smart_quotes = '\%(\w\|[^[:punct:][:space:]"''`]\|\%(\\\\\)*\\\)\%#\|\%#\%(\w\|[^[:space:][:punct:]"''`]\)'
( ) delimitMate_tab2exit = 1

( ) g:delimitMate_excluded_ft = ''
--------------------

* Mappings:

                                                               i  )            @<Plug>delimitMate)
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  }            @<Plug>delimitMate}
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  ]            @<Plug>delimitMate]
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  (            @<Plug>delimitMate(
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  {            @<Plug>delimitMate{
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  [            @<Plug>delimitMate[
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  "            @<Plug>delimitMate"
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  '            @<Plug>delimitMate'
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  `            @<Plug>delimitMate`
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  <BS>        * <SNR>68_OnDeleteChar( "\<BS>" )
	最近修改于 ~/.vim/bundle/YouCompleteMe/autoload/youcompleteme.vim
i  <S-BS>       @<Plug>delimitMateS-BS
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  <S-Tab>     * pumvisible() ? "\<C-P>" : "\<S-Tab>"
	最近修改于 ~/.vim/bundle/YouCompleteMe/autoload/youcompleteme.vim
i  <C-G>g       @<Plug>delimitMateJumpMany
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
i  <CR>         @<Plug>delimitMateCR
	最近修改于 ~/.vim/bundle/delimitMate/plugin/delimitMate.vim
--------------------

* Showcase:

Open: (|)
Delete: |)
Exit: ()|
Car return: (
|
)
Delete car return: (|
)

Open: {|}
Delete: |}
Exit: {}|
Car return: {
    |
}
Delete car return: {|
}

Open: [|]
Delete: |]
Exit: []|
Car return: [
|
]
Delete car return: [|
]

Open: "|"
Delete: |"
Exit: ""|

Open: '|'
Delete: |'
Exit: ''|

Open: `|`
Delete: |`
Exit: ``|

 * Vim configuration:

filetype detection:ON  plugin:ON  indent:ON

--- 选项 ---
  autochdir           breakindent         cpoptions=aAceFsB   filetype=python     helplang=cn         keywordprg=pydoc    report=0            showcmd             splitbelow          ttyfast
  autoindent          comments=b:#,fb:-   cursorcolumn        foldlevel=1         hlsearch            laststatus=2        ruler               smartcase           splitright          ttymouse=sgr
  autoread            confirm             cursorline          foldlevelstart=1    ignorecase          modified            scroll=29           smartindent         suffixesadd=.py     wildignore=*.pyc
  background=dark     copyindent          expandtab           foldmethod=indent   incsearch           number              shiftwidth=4        softtabstop=4       syntax=python
  backspace=indent,eol,start
  cinkeys=0{,0},0),:,!^F,o,O,e
  commentstring=# %s
  completefunc=youcompleteme#CompleteFunc
  completeopt=menuone
  fileencoding=utf-8
  fileencodings=ucs-bom,utf-8,default,latin1
  include=^\s*\(from\|import\)
  includeexpr=substitute(v:fname,'\.','/','g')
  indentexpr=GetPythonIndent(v:lnum)
  indentkeys=0{,0},:,!^F,o,O,e,<:>,=elif,=except
  omnifunc=pythoncomplete#Complete
  printoptions=paper:a4
  runtimepath=~/.vim,~/.vim/bundle/Vundle.vim,~/.vim/bundle/vim-autoformat,~/.vim/bundle/YouCompleteMe,~/.vim/bundle/syntastic,~/.vim/bundle/vimcdoc,~/.vim/bundle/delimitMate,~/.vim/bundle/nerdcommenter,~/.vim/bundle/nerdtree,~/.vim/bundle/nerdtree-git-plugin,/var/lib/vim/addons,/usr/share/vim/vimfiles,/usr/share/vim/vim74,/usr/share/vim/vimfiles/after,/var/lib/vim/addons/after,~/.vim/after,~/.vim/bundle/Vundle.vim/,~/.vim/bundle/Vundle.vim/after,~/.vim/bundle/vim-autoformat/after,~/.vim/bundle/YouCompleteMe/after,~/.vim/bundle/syntastic/after,~/.vim/bundle/vimcdoc/after,~/.vim/bundle/delimitMate/after,~/.vim/bundle/nerdcommenter/after,~/.vim/bundle/nerdtree/after,~/.vim/bundle/nerdtree-git-plugin/after
  shortmess=filnxtToOc
  statusline= %<%F[%1*%M%*%n%R%H%W]%= %y %0(%{&fileformat} %{&encoding} %l/%L:%c %p%%%) 
  suffixes=.bak,~,.swp,.o,.info,.aux,.log,.dvi,.bbl,.blg,.brf,.cb,.ind,.idx,.ilg,.inx,.out,.toc

VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Nov 24 2016 16:44:48)
包含补丁: 1-1689
另外的补丁： 8.0.0056
修改者 pkg-vim-maintainers@lists.alioth.debian.org
编译者 pkg-vim-maintainers@lists.alioth.debian.org
巨型版本 无图形界面。  可使用(+)与不可使用(-)的功能:
+acl             -clipboard       +dialog_con      +file_in_path    +job             +menu            -mouse_sysmouse  +persistent_undo +scrollbind      -tcl             +visual          -xim
+arabic          +cmdline_compl   +diff            +find_in_path    +jumplist        +mksession       +mouse_urxvt     +postscript      +signs           +terminfo        +visualextra     -xsmp
+autocmd         +cmdline_hist    +digraphs        +float           +keymap          +modify_fname    +mouse_xterm     +printer         +smartindent     +termresponse    +viminfo         -xterm_clipboard
-balloon_eval    +cmdline_info    -dnd             +folding         +langmap         +mouse           +multi_byte      +profile         +startuptime     +textobjects     +vreplace        -xterm_save
-browse          +comments        -ebcdic          -footer          +libcall         -mouseshape      +multi_lang      -python          +statusline      +timers          +wildignore      -xpm
++builtin_terms  +conceal         +emacs_tags      +fork()          +linebreak       +mouse_dec       -mzscheme        +python3         -sun_workshop    +title           +wildmenu        
+byte_offset     +cryptv          +eval            +gettext         +lispindent      +mouse_gpm       +netbeans_intg   +quickfix        +syntax          -toolbar         +windows         
+channel         +cscope          +ex_extra        -hangul_input    +listcmds        -mouse_jsbterm   +packages        +reltime         +tag_binary      +user_commands   +writebackup     
+cindent         +cursorbind      +extra_search    +iconv           +localmap        +mouse_netterm   +path_extra      +rightleft       +tag_old_static  +vertsplit       -X11             
-clientserver    +cursorshape     +farsi           +insert_expand   -lua             +mouse_sgr       -perl            -ruby            -tag_any_white   +virtualedit     -xfontset        
     系统 vimrc 文件: "$VIM/vimrc"
     用户 vimrc 文件: "$HOME/.vimrc"
 第二用户 vimrc 文件: "~/.vim/vimrc"
      用户 exrc 文件: "$HOME/.exrc"
         $VIM 预设值: "/usr/share/vim"
编译方式: gcc -c -I. -Iproto -DHAVE_CONFIG_H   -Wdate-time  -g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1      
链接方式: gcc   -Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -o vim        -lm -ltinfo -lnsl  -lselinux  -lacl -lattr -lgpm -ldl     -L/usr/lib/python3.5/config-3.5m-x86_64-linux-gnu -lpython3.5m -lpthread -ldl -lutil -lm      

---

[Raimondi]

That's because youcompleteme has mapped <BS>:

i  <BS>        * <SNR>68_OnDeleteChar( "\<BS>" )
	最近修改于 ~/.vim/bundle/YouCompleteMe/autoload/youcompleteme.vim

[drchen00]

Yes, the bug is caused by YCM indeed.
https://github.com/Valloric/YouCompleteMe/issues/2696 can fix it.(I also have remaped )