Doesn't work with latest Emacs

[ikazuhiro]

auto-complete doesn't work with latest Emacs (master branch). Backtrace is below.

Debugger entered--Lisp error: (wrong-type-argument sequencep #<obarray n=1>)
  vconcat(#<obarray n=1> #<obarray n=1>)
  (append (vconcat local-abbrev-table global-abbrev-table) nil)
  (mapcar 'popup-x-to-string (append (vconcat local-abbrev-table global-abbrev-table) nil))
  eval((mapcar 'popup-x-to-string (append (vconcat local-abbrev-table global-abbrev-table) nil)))
  ac-candidates-1(((prefix . ac-prefix-default) (candidates mapcar 'popup-x-to-string (append (vconcat local-abbrev-table global-abbrev-table) nil)) (action . expand-abbrev) (symbol . "a") (cache)))
  ac-candidates()
  ac-update(nil)
  ac-update-greedy()
  apply(ac-update-greedy nil)
  timer-event-handler([t 0 0 100000 0.1 ac-update-greedy nil idle 0 nil])

obarray is no longer treated as vector, it means vectorp, sequencep and arrayp for obarray returns nil.