import boxed for alloc/rc.rs (fixup #22696)

diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 5b3d7c9ea902b1f2223eeef86534ae7d7c5f467d..f57286bbf11c9af56ee608e8b9af720ddf00eaa4 100644 (file)
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -143,8 +143,10 @@
 //! ```
 
 #![stable(feature = "rust1", since = "1.0.0")]
-
+#[cfg(not(test))]
 use boxed;
+#[cfg(test)]
+use std::boxed;
 use core::cell::Cell;
 use core::clone::Clone;
 use core::cmp::{PartialEq, PartialOrd, Eq, Ord, Ordering};