Command-T crashes in Vim 8.0 on OS X Sierra 10.12.3

[stupakov]

I recently updated to OS X Sierra, and got this error: command-t.vim could not load the C extension After recompiling the command-t extension, vim crashes on launch.

:ruby puts "#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}"
output: 
2.0.0-p648

> cd ~/.vim/bundle/command-t/ruby/command-t
> rvm use 2.0.0-p648
> ruby extconf.rb && make clean && make
compiling ext.c
compiling match.c
compiling matcher.c
linking shared-object ext.bundle

> vim
Vim: Caught deadly signal SEGV
Vim: Finished.
Segmentation fault: 11

> make clean
> vim
[vim opens successfully]

> vim -V99
...
sourcing "/Users/stupakov/.vim/bundle/command-t/plugin/command-t.vim"
...
line 159: function CommandTCursorStart()=
line 162:
line 163: ruby << EOF
Vim: Caught deadly signal SEGV

Do you have any suggestions for troubleshooting this?

Output of vim --version is below.

→ vim --version
VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Feb 27 2017 23:37:35)
MacOS X (unix) version
Included patches: 1-329
Compiled by Homebrew
Huge version with MacVim GUI.  Features included (+) or not (-):
+acl             +find_in_path    -mouse_sysmouse  -tag_any_white
+arabic          +float           +mouse_urxvt     -tcl
+autocmd         +folding         +mouse_xterm     +termguicolors
+balloon_eval    -footer          +multi_byte      +terminfo
+browse          +fork()          +multi_lang      +termresponse
++builtin_terms  +fullscreen      -mzscheme        +textobjects
+byte_offset     -gettext         +netbeans_intg   +timers
+channel         -hangul_input    +num64           +title
+cindent         +iconv           +odbeditor       +toolbar
+clientserver    +insert_expand   +packages        +transparency
+clipboard       +job             +path_extra      +user_commands
+cmdline_compl   +jumplist        +perl            +vertsplit
+cmdline_hist    +keymap          +persistent_undo +virtualedit
+cmdline_info    +lambda          +postscript      +visual
+comments        +langmap         +printer         +visualextra
+conceal         +libcall         +profile         +viminfo
+cryptv          +linebreak       +python          +vreplace
+cscope          +lispindent      -python3         +wildignore
+cursorbind      +listcmds        +quickfix        +wildmenu
+cursorshape     +localmap        +reltime         +windows
+dialog_con_gui  -lua             +rightleft       +writebackup

+diff            +menu            +ruby            -X11
+digraphs        +mksession       +scrollbind      -xfontset
+dnd             +modify_fname    +signs           +xim
-ebcdic          +mouse           +smartindent     -xpm
+emacs_tags      +mouseshape      +startuptime     -xsmp
+eval            +mouse_dec       +statusline      -xterm_clipboard
+ex_extra        -mouse_gpm       -sun_workshop    -xterm_save
+extra_search    -mouse_jsbterm   +syntax
+farsi           +mouse_netterm   +tag_binary
+file_in_path    +mouse_sgr       +tag_old_static
   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: "/Applications/MacVim.app/Contents/Resources/vim"
Compilation: clang -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_MACVIM -Wall -Wno-unknown-pragmas -pipe  -DMACOS_X_UNIX  -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -fno-strict-aliasing -fno-common -dynamic -arch x86_64 -arch i386 -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: clang   -L. -L/usr/local/lib -L. -L/usr/local/lib -L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config -lpython2.7 -framework CoreFoundation -L/usr/local/lib -o Vim -framework Cocoa -framework Carbon       -lm  -lncurses -liconv -framework Cocoa   -fstack-protector  -L/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE -lperl -framework Python   -framework Ruby

[wincent]

Thanks for the very detailed issue write-up.

I'm guessing that the Homebrew-installed Vim that you're using is probably linked against a different version of Ruby than the 2.0.0-p648 that you used to build Command-T. I'd pick a single version of Ruby (probably simplest and safest to use the system Ruby — ie. rvm use system) and build both with that.

Going to mark this as closed because it is a compilation error, not a bug, and therefore not actionable from this end, but feel free to comment again if you have any further questions or comments etc.