Subject: bug#9687: setq-default fails on enable-multibyte-characters

From: Glenn Morris <[email-masked]>
Date: Thu, 06 Oct 2011 15:12:26 -0400

Package: emacs
Version: 24.0.90

emacs -Q
C-h v enable-multibyte-characters

   Changing its default value with `setq-default' is supported.

Oh no it isn't:

(setq-default enable-multibyte-characters t)
  -> Lisp error: (setting-constant enable-multibyte-characters)