Setting winum-scope to frame-local breaks window management

[Alexander-Miller]

After updating to the newest spacemacs version that now uses winum I've added a single line to my config:

(setq winum-scope 'frame-local)

With this change I am no longer able to open any windows, unless I restart window-mode. What usually happens instead is that some more windows are spawned, but they just show the same buffer as the current window and an error is thrown. Fortunately I sometimes do get a usable stacktrace:

Debugger entered--Lisp error: (wrong-type-argument hash-table-p nil)
  puthash(#<frame emacs@a-laptop 0x1237c30> ([nil nil nil nil nil nil nil nil] . #s(hash-    table size 7 test eql rehash-size 1.5 rehash-threshold 0.8125 data ())) nil)
  winum--update()

Issue appears under the same conditions as in my other ticket.

[Alexander-Miller]

All fixed now.