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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 7aaa91ee10d..9bcfc9457f5 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -93,6 +93,7 @@
 #![feature(container_error_extra)]
 #![feature(dropck_eyepatch)]
 #![feature(exact_size_is_empty)]
+#![feature(extend_one)]
 #![feature(fmt_internals)]
 #![feature(fn_traits)]
 #![feature(fundamental)]