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-rw-r--r--src/test/bench/shootout-binarytrees.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/test/bench/shootout-binarytrees.rs b/src/test/bench/shootout-binarytrees.rs
index 38fc53ccd36..64c38722137 100644
--- a/src/test/bench/shootout-binarytrees.rs
+++ b/src/test/bench/shootout-binarytrees.rs
@@ -38,6 +38,8 @@
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#![feature(rustc_private, core)]
+
 extern crate arena;
 
 use std::iter::range_step;