Upgrading to the latest vim via homebrew recently seems to have broken this matcher. Starting a search in ctrlp now yields no results, no matter the search term.
$ brew info vim
vim: stable 8.0.1750 (bottled), HEAD
$ vim --version
VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Apr 24 2018 05:16:21)
macOS version
Included patches: 1-1750
Compiled by Homebrew
Huge version without GUI. Features included (+) or not (-):
+acl +farsi +mouse_sgr -tag_any_white
+arabic +file_in_path -mouse_sysmouse -tcl
+autocmd +find_in_path +mouse_urxvt +termguicolors
-autoservername +float +mouse_xterm +terminal
-balloon_eval +folding +multi_byte +terminfo
+balloon_eval_term -footer +multi_lang +termresponse
-browse +fork() -mzscheme +textobjects
++builtin_terms -gettext +netbeans_intg +timers
+byte_offset -hangul_input +num64 +title
+channel +iconv +packages -toolbar
+cindent +insert_expand +path_extra +user_commands
-clientserver +job +perl +vertsplit
+clipboard +jumplist +persistent_undo +virtualedit
+cmdline_compl +keymap +postscript +visual
+cmdline_hist +lambda +printer +visualextra
+cmdline_info +langmap +profile +viminfo
+comments +libcall -python +vreplace
+conceal +linebreak +python3 +wildignore
+cryptv +lispindent +quickfix +wildmenu
+cscope +listcmds +reltime +windows
+cursorbind +localmap +rightleft +writebackup
+cursorshape -lua +ruby -X11
+dialog_con +menu +scrollbind -xfontset
+diff +mksession +signs -xim
+digraphs +modify_fname +smartindent -xpm
-dnd +mouse +startuptime -xsmp
-ebcdic -mouseshape +statusline -xterm_clipboard
+emacs_tags +mouse_dec -sun_workshop -xterm_save
+eval -mouse_gpm +syntax
+ex_extra -mouse_jsbterm +tag_binary
+extra_search +mouse_netterm +tag_old_static
system vimrc file: "$VIM/vimrc"
user vimrc file: "$HOME/.vimrc"
2nd user vimrc file: "~/.vim/vimrc"
user exrc file: "$HOME/.exrc"
defaults file: "$VIMRUNTIME/defaults.vim"
fall-back for $VIM: "/usr/local/share/vim"
Compilation: clang -c -I. -Iproto -DHAVE_CONFIG_H -D_DARWIN_C_SOURCE -DMACOS_X -DMACOS_X_DARWIN -g -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: clang -L. -fstack-protector -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl/lib -L/usr/local/opt/readline/lib -L/usr/local/lib -o vim -lncurses -liconv -framework AppKit -mmacosx-version-min=10.13 -fstack-protector-strong -L/usr/local/lib -L/usr/local/Cellar/perl/5.26.2/lib/perl5/5.26.2/darwin-thread-multi-2level/CORE -lperl -lm -lutil -lc -L/usr/local/opt/python/Frameworks/Python.framework/Versions/3.6/lib/python3.6/config-3.6m-darwin -lpython3.6m -framework CoreFoundation -lruby.2.5.1 -lobjc
Upgrading to the latest vim via homebrew recently seems to have broken this matcher. Starting a search in ctrlp now yields no results, no matter the search term.