I've recently learned about Vim's omnicompletion and while attempting to make it work, I get the error Pattern not found. To test it I used the following code:class C  def hello    puts Hello, World!  end  def goodbye    puts Goodbye, cruel world!  endendx = C.newx.<C-x><C-o>Which gives the error Pattern not found.My version of Vim is compiled with +ruby/dyn, and it seems that the error is because the file Vim is trying to load doesn't match my version of Ruby, which seemed to be a problem for some other people using Ruby 1.9.x in another forum thread I saw. In :h ruby-dynamic that you are able to change the library it uses with 'rubydll', but it must be the same version that Vim is compiled with. My version of Vim is 8.0.5 and I'm using Ruby 2.3.1. I also read in :h 'rubydll' that the default library to use is DYNAMIC_RUBY_DLL which is set at compile time, but I'm not sure how to check what this is set to.UPDATE: vim --version output:VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Sep 15 2016 10:09:09)Included patches: 1-5Compiled by Arch LinuxHuge version with GTK2 GUI.  Features included (+) or not (-):+acl             +file_in_path    +mouse_sgr       +tag_old_static+arabic          +find_in_path    -mouse_sysmouse  -tag_any_white+autocmd         +float           +mouse_urxvt     +tcl/dyn+balloon_eval    +folding         +mouse_xterm     +termguicolors+browse          -footer          +multi_byte      +terminfo++builtin_terms  +fork()          +multi_lang      +termresponse+byte_offset     +gettext         -mzscheme        +textobjects+channel         -hangul_input    +netbeans_intg   +timers+cindent         +iconv           +num64           +title+clientserver    +insert_expand   +packages        +toolbar+clipboard       +job             +path_extra      +user_commands+cmdline_compl   +jumplist        +perl/dyn        +vertsplit+cmdline_hist    +keymap          +persistent_undo +virtualedit+cmdline_info    +lambda          +postscript      +visual+comments        +langmap         +printer         +visualextra+conceal         +libcall         +profile         +viminfo+cryptv          +linebreak       +python/dyn      +vreplace+cscope          +lispindent      +python3/dyn     +wildignore+cursorbind      +listcmds        +quickfix        +wildmenu+cursorshape     +localmap        +reltime         +windows+dialog_con_gui  +lua/dyn         +rightleft       +writebackup+diff            +menu            +ruby/dyn        +X11+digraphs        +mksession       +scrollbind      -xfontset+dnd             +modify_fname    +signs           +xim-ebcdic          +mouse           +smartindent     -xpm+emacs_tags      +mouseshape      +startuptime     +xsmp_interact+eval            +mouse_dec       +statusline      +xterm_clipboard+ex_extra        +mouse_gpm       -sun_workshop    -xterm_save+extra_search    -mouse_jsbterm   +syntax          +farsi           +mouse_netterm   +tag_binary         system vimrc file: /etc/vimrc     user vimrc file: $HOME/.vimrc 2nd user vimrc file: ~/.vim/vimrc      user exrc file: $HOME/.exrc  system gvimrc file: /etc/gvimrc    user gvimrc file: $HOME/.gvimrc2nd user gvimrc file: ~/.vim/gvimrc       defaults file: $VIMRUNTIME/defaults.vim    system menu file: $VIMRUNTIME/menu.vim  fall-back for $VIM: /usr/share/vimCompilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK  -pthread -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libdrm -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/pango-1.0 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -D_FORTIFY_SOURCE=2  -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1      Linking: gcc   -L. -Wl,-O1,--sort-common,--as-needed,-z,relro -fstack-protector -rdynamic -Wl,-export-dynamic -Wl,-E -Wl,-rpath,/usr/lib/perl5/core_perl/CORE  -Wl,-O1,--sort-common,--as-needed,-z,relro -L/usr/local/lib -Wl,--as-needed -o vim   -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype -lSM -lICE -lXt -lX11 -lXdmcp -lSM -lICE  -lm -lncurses -lelf -lnsl    -lacl -lattr -lgpm -ldl   -Wl,-E -Wl,-rpath,/usr/lib/perl5/core_perl/CORE -Wl,-O1,--sort-common,--as-needed,-z,relro -fstack-protector-strong -L/usr/local/lib  -L/usr/lib/perl5/core_perl/CORE -lperl -lpthread -lnsl -ldl -lm -lcrypt -lutil -lc   -L/usr/lib -ltclstub8.6 -ldl -lz -lpthread -lieee -lm  
Vim omnicomplete with Ruby 2.3.1
autocompletion;filetype ruby