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-rw-r--r--src/libcore/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index 7243bd4f0cb..f1808bc1fb5 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -67,6 +67,7 @@
 #![feature(simd, unsafe_destructor)]
 #![feature(staged_api)]
 #![feature(unboxed_closures)]
+#![feature(rustc_attrs)]
 
 #[macro_use]
 mod macros;