Vim crashes with neocomplcache

[tetsutan]

When I set g:clang_use_library = 0, Vim was not crashed. But, changed to g:clang_use_library = 1, crashed. In either case, I used neocomplcache.

this is GDB log.

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000008
0x0000000100017b3b in ins_compl_next (allow_get_expansion=1606383760, count=1606383760, insert_match=1606383760) at edit.c:4460
4460            else if (compl_shows_dir == BACKWARD  

and then , _compl_showsdir pointer was 0x00. backtrace is here. https://gist.github.com/4513231

this is My MINIMUM vimrc

" vundle
set nocompatible
filetype off

set rtp+=~/.vim/neobundle.vim.git

if has('vim_starting')
  set runtimepath+=~/.vim/neobundle.vim.git
  call neobundle#rc(expand('~/.vim/bundle/'))
endif

NeoBundle 'Shougo/neocomplcache'
NeoBundle 'Rip-Rip/clang_complete'

filetype on
filetype indent on
filetype plugin on

" neocomplcache
let g:neocomplcache_enable_at_startup = 1

" force omni
if !exists('g:neocomplcache_force_omni_patterns')
  let g:neocomplcache_force_omni_patterns = {}
endif
let g:neocomplcache_force_overwrite_completefunc = 1
let g:neocomplcache_force_omni_patterns.c =
      \ '[^.[:digit:] *\t]\%(\.\|->\)'
let g:neocomplcache_force_omni_patterns.cpp =
      \ '[^.[:digit:] *\t]\%(\.\|->\)\|\h\w*::'
let g:neocomplcache_force_omni_patterns.objc =
      \ '[^.[:digit:] *\t]\%(\.\|->\)'
let g:neocomplcache_force_omni_patterns.objcpp =
      \ '[^.[:digit:] *\t]\%(\.\|->\)\|\h\w*::'

" clang
" let g:clang_path = "clang++"
let g:clang_complete_auto = 0
let g:clang_auto_select = 0
let g:clang_use_library = 1
" let g:clang_library_path = "/usr/lib"
" let g:clang_complete_copen = 0
" let g:clang_user_options='|| exit 0'
" let g:clang_close_preview=1

Vim: (and compiled from source code to use with gdb)

VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Jan 10 2013 10:17:24)
MacOS X (unix) version
Included patches: 1-762
Compiled by yano@masck.local
Huge version without GUI.  Features included (+) or not (-):
+arabic +autocmd -balloon_eval -browse ++builtin_terms +byte_offset +cindent 
-clientserver +clipboard +cmdline_compl +cmdline_hist +cmdline_info +comments 
+conceal +cryptv +cscope +cursorbind +cursorshape +dialog_con +diff +digraphs 
-dnd -ebcdic +emacs_tags +eval +ex_extra +extra_search +farsi +file_in_path 
+find_in_path +float +folding -footer +fork() -gettext -hangul_input +iconv 
+insert_expand +jumplist +keymap +langmap +libcall +linebreak +lispindent 
+listcmds +localmap -lua +menu +mksession +modify_fname +mouse -mouseshape 
+mouse_dec -mouse_gpm -mouse_jsbterm +mouse_netterm +mouse_sgr -mouse_sysmouse 
+mouse_urxvt +mouse_xterm +multi_byte +multi_lang -mzscheme +netbeans_intg 
+path_extra -perl +persistent_undo +postscript +printer +profile +python 
-python3 +quickfix +reltime +rightleft +ruby +scrollbind +signs +smartindent 
-sniff +startuptime +statusline -sun_workshop +syntax +tag_binary 
+tag_old_static -tag_any_white -tcl +terminfo +termresponse +textobjects +title
 -toolbar +user_commands +vertsplit +virtualedit +visual +visualextra +viminfo 
+vreplace +wildignore +wildmenu +windows +writebackup -X11 -xfontset -xim -xsmp
 -xterm_clipboard -xterm_save 
   system vimrc file: "$VIM/vimrc"
     user vimrc file: "$HOME/.vimrc"
      user exrc file: "$HOME/.exrc"
  fall-back for $VIM: "/usr/local/share/vim"
Compilation: /usr/bin/clang -c -I. -Iproto -DHAVE_CONFIG_H   -DMACOS_X_UNIX -no-cpp-precomp  -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.8 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1      
Linking: /usr/bin/clang   -L.    -L/usr/local/lib -o vim       -lm  -lncurses -liconv -framework Cocoa     -framework Python   -lruby -lobjc  

clang:

Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin12.2.1
Thread model: posix

OS: MacOS 10.8.2 Mountain Lion. neocomplcache: d62b955 2013-01-07 clang_complete: ef3ddfd 2012-11-20

[xavierd]

Could you try without neocomplcache? (In fact with only clang_complete plugin) Thanks!

[tetsutan]

Without neocomplcache, It shows no error.

On filetype=c file, regardless of using neocomplcache, it have no error and display completions.

On filetype=objc file and import headers of Xcode(e.g. .clang_complete includes "-I /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/usr/include"), Regardless of using neocomplcache (,and regardless of using libclang), It display NO completions.

Crash when ・filetype=objc ・import headers of Xcode ・g:clang_use_library = 1 ・use neocomplcache

No Completion when ・filetype=objc ・import headers of Xcode ・(g:clang_use_library = 1 / 0) ・(with/without neocomplcache)

[xavierd]

When you say "It display NO completions", did you try using ? (It may sound a stupid question, but I want to be sure).

[tetsutan]

I create Xcode project named "first".

yano@masck.local [~/dev/xcode/first/first] [master *]
-> % ls                                                                                                                                                         [05:26:58] .rb system .py 2.7.3 .js v0.8.16
AppDelegate.h          DetailViewController.h MasterViewController.h en.lproj               first-Prefix.pch
AppDelegate.m          DetailViewController.m MasterViewController.m first-Info.plist       main.m
yano@masck.local [~/dev/xcode/first/first] [master *]
-> % cat .clang_complete                                                                                                                                        [05:26:59] .rb system .py 2.7.3 .js v0.8.16
 -I /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/usr/include

 yano@masck.local [~] 
-> % cat .vimrc                                                                                                                                                 [05:34:33] .rb system .py 2.7.3 .js v0.8.16

" vundle
set nocompatible
filetype off

set rtp+=~/.vim/neobundle.vim.git

if has('vim_starting')
  set runtimepath+=~/.vim/neobundle.vim.git
  call neobundle#rc(expand('~/.vim/bundle/'))
endif

NeoBundle 'Shougo/neocomplcache'
NeoBundle 'Rip-Rip/clang_complete'

filetype on
filetype indent on
filetype plugin on

" neocomplcache
let g:neocomplcache_enable_at_startup = 1
" ignore case
let g:neocomplcache_enable_ignore_case = 1
" 大文字小文字を区別する
let g:neocomplcache_enable_smart_case = 1
" キャメルケース補完を有効にする
"let g:neocomplcache_enable_camel_case_completion = 1
" アンダーバー補完を有効にする
let g:neocomplcache_enable_underbar_completion = 1

" force omni
if !exists('g:neocomplcache_force_omni_patterns')
  let g:neocomplcache_force_omni_patterns = {}
endif
let g:neocomplcache_force_overwrite_completefunc = 1
let g:neocomplcache_force_omni_patterns.c =
      \ '[^.[:digit:] *\t]\%(\.\|->\)'
let g:neocomplcache_force_omni_patterns.cpp =
      \ '[^.[:digit:] *\t]\%(\.\|->\)\|\h\w*::'
let g:neocomplcache_force_omni_patterns.objc =
      \ '[^.[:digit:] *\t]\%(\.\|->\)'
let g:neocomplcache_force_omni_patterns.objcpp =
      \ '[^.[:digit:] *\t]\%(\.\|->\)\|\h\w*::'

" clang
let g:clang_complete_auto = 0
let g:clang_auto_select = 0
let g:clang_use_library = 1
" let g:clang_library_path = "/usr/lib"
" let g:clang_complete_copen = 0
" let g:clang_user_options='|| exit 0'
" let g:clang_close_preview=1
" let g:clang_user_options = ' -fblocks -fobjc-arc -D__IPHONE_OS_VERSION_MIN_REQUIRED=40300 -F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/System/Library/Frameworks -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/usr/include -std=c++11 -include=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/System/Library/Frameworks/CoreAudio.framework/Headers/CoreAudioTypes.h '
let g:clang_user_options = '-std=c++11'

vim crash when open MasterViewController.m and execute ^X^U.

vim does not crash when I create new file (test.cpp) on same directory and execute ^X^U. neocomplcache_enable_at_startup is true, therefore completion is showed automatically on test.cpp. but ^X^U is hooked.

[xavierd]

Thanks for those infos. If you have some time could you try bisecting it? That would help us finding a fix quickly!

[xavierd]

Before doing that, could you test the code in pull request #239, it may solve the issue.

[tetsutan]

Sorry. NO completion is my mistake. g:neocomplcache_force_omni_patterns.objc was wrong.

but segv still occur, when I press ^X^U.

line at 328 on libclang.py, vim.eval('compelte_check()') got segv

this bug may owe vim. The cause is compl_shown_match is NULL on edit.c of vim. libclang.py call vim.eval('complete_check()'). complete_check call ins_compl_check_keys. ins_compl_check_keys call ins_compl_next. ins_compl_next refer to compl_shown_match.

Meanwhile, it is not checked whether compl_shown_match is NULL. I do not know that compl_shown_match must be set. I cannot determine that this is Vim issue or clang_complete issue or neocomplcache issue. Neocomplcache may reset compl_shown_match. If resetting compl_shown_match by neocomplcache is wrong way, I will report to an auther of neocomplcache.

[xavierd]

Since you have access to the backtrace, it would be great if you could fully trace it into clang_complete and neocompletecache. I'm in fact worried about a comment in complete_check documentation that say: "Only to be used by the function specified with the 'completefunc' option."

[tetsutan]

Thanks a lot.

239 solved this bug completely.

this does not seem to come into conflict with neocomplcache.

[xavierd]

Great! Closing this bug.