”No items suitable for an index found in this buffer”

[jason--liu]

Hi, I use imenu-list in spacemacs, I often encounter that there are no items in imenu when I open the C file. After M-x toggle-debug-on-error, then M-x imenu, the error message is below.

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  string-match("\\`hlist_node\\'" nil)
  imenu-find-default(#("hlist_node" 0 10 (fontified t face font-lock-type-face)) (("*Rescan*" . -99) (nil)))
  imenu--completion-buffer((("*Rescan*" . -99) nil) nil)
  imenu-choose-buffer-index()
  byte-code("\300 C\207" [imenu-choose-buffer-index] 1)
  call-interactively(imenu record nil)
  command-execute(imenu record)
  counsel-M-x-action("imenu")
  ivy-call()
  ivy-read("M-x " ("imenu-list-refresh" "toggle-debug-on-error" "calendar" "org-mode" "counsel-linux-app" "toggle-input-method" "magit-blame" "magit-log" "hide-ifdef-mode" "counsel-etags-update-tags-force" "calc" "calculator" "clang-format-buffer" "asm-mode" "makefile-mode" "counsel-etags-list-tag-in-current-file" "imenu-list-show-noselect" "imenu-add-menubar-index" "imenu-list-show" "s" "cd" "5x5" "arp" "dbx" "dig" "erc" "ert" "eww" "ftp" "gdb" "irc" "hide-ifdefs" "ede" "jdb" "lsp" "man" "mpc" "pdb" "pwd" "rsh" "sdb" "xdb" "diff" "dirs" "ffap" "gnus" "grep" "help" "ielm" "info" ...) :predicate counsel--M-x-externs-predicate :require-match t :history counsel-M-x-history :action counsel-M-x-action :keymap (keymap (67108908 . counsel--info-lookup-symbol) (67108910 . counsel-find-symbol)) :initial-input nil :caller counsel-M-x)
  counsel-M-x()
  funcall-interactively(counsel-M-x)
  call-interactively(counsel-M-x nil nil)
  command-execute(counsel-M-x)

emacs --version

GNU Emacs 26.3
Copyright (C) 2019 Free Software Foundation, Inc.
GNU Emacs comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GNU Emacs
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING.

and use the latest spacemacs development branch. Thanks !