* lisp/erc/erc-backend.el: Only require `erc' during compilation.

Fixes: debbugs:12486

lisp/erc/ChangeLog

@@ -1,3 +1,7 @@
+2012-10-28  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+	* erc-backend.el: Only require `erc' during compilation (bug#12486).
+
 2012-10-18  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* erc-backend.el: Require `erc' instead of autoloading its macros

lisp/erc/erc-backend.el

@@ -102,8 +102,7 @@
 ;; There's a fairly strong mutual dependency between erc.el and erc-backend.el.
 ;; Luckily, erc.el does not need erc-backend.el for macroexpansion whereas the
 ;; reverse is true:
-(provide 'erc-backend)
-(require 'erc)
+(eval-when-compile (provide 'erc-backend) (require 'erc))
 
 ;;;; Variables and options