rebase: get bug! macro

Author: nikomatsakis

src/librustc_incremental/lib.rs

@@ -24,7 +24,7 @@
 
 extern crate graphviz;
 extern crate rbml;
-extern crate rustc;
+#[macro_use] extern crate rustc;
 extern crate rustc_data_structures;
 extern crate serialize as rustc_serialize;