void variable

[Lars Hansen]

Assume that you on the load path have a file foo.el containing the line

 (defvar foo 'x)

If you evaluate

 (let ((foo 'y)) (load "foo.el"))
 foo

you get

 Symbol's value as variable is void: foo

Observe that the loading may very well be implicit like in

 (let ((foo 'y)) (bar))

where bar could be an autoloaded function in foo.el or even in another 
module requiring foo.el.
This behavior is not new. It works like that in Emacs 21.2 and Emacs 20.7.

Is the behavior a bug that should be fixed, or is it OK but should be 
documented? Or is it documented already?