Subject: bug#46820: 28.0.50; easy-menu-define failure in cmuscheme

From: Juri Linkov <[email-masked]>
Date: Sat, 27 Feb 2021 22:30:01 +0200

After the recent change of adding easy-menu-define in scheme-mode,
when the init file contains the line:

  (require 'cmuscheme)

loading Emacs fails with the error

Debugger entered--Lisp error: (wrong-type-argument keymapp nil)
  define-key(nil [separator-eval] ("--"))
  require(cmuscheme)