bench: Fix fallout in benchmarks
diff --git a/src/test/debuginfo/issue13213.rs b/src/test/debuginfo/issue13213.rs
index 38b149e..13dc0c6 100644
--- a/src/test/debuginfo/issue13213.rs
+++ b/src/test/debuginfo/issue13213.rs
@@ -23,5 +23,5 @@
 // be available because they have been optimized out from the exporting crate.
 fn main() {
     let b: issue13213aux::S = issue13213aux::A;
-    ::std::old_io::println("Nothing to do here...");
+    println!("Nothing to do here...");
 }