bug#20139: 25.0.50; eval-buffer ignores lexical-binding

[Jorgen Schaefer]

Given a buffer with these contents:

(setq lexical-binding t)
(message "%s" (lambda () a))

Evaluating both lines with C-x C-e will message (closure (t) nil a), as
it should. But M-x eval-buffer will message (lambda nil a), i.e.
eval-buffer ignores the value of lexical-binding.

I do not think this is the intended behavior :-)

Regards,
Jorgen

In GNU Emacs 25.0.50.1 (x86_64-unknown-linux-gnu)
 of 2015-02-21 on loki.jorgenschaefer.de
Repository revision: 9074a684990600abd9dfad0477c7cd1d2f339ed3
System Description:     Debian GNU/Linux 7.8 (wheezy)

Configured using:
 `configure --without-x'