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-rw-r--r--src/liballoc/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index 163aef61b43..52011303543 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -90,6 +90,7 @@
 #![feature(collections_range)]
 #![feature(const_fn)]
 #![feature(core_intrinsics)]
+#![cfg_attr(stage0, feature(core_slice_ext))]
 #![feature(custom_attribute)]
 #![feature(dropck_eyepatch)]
 #![feature(exact_size_is_empty)]