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-rw-r--r--src/libcore/tests/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcore/tests/lib.rs b/src/libcore/tests/lib.rs
index e9a8113ef10..1c71669abb1 100644
--- a/src/libcore/tests/lib.rs
+++ b/src/libcore/tests/lib.rs
@@ -27,7 +27,7 @@
 #![cfg_attr(stage0, feature(inclusive_range_syntax))]
 #![feature(iterator_try_fold)]
 #![feature(iterator_flatten)]
-#![feature(conservative_impl_trait)]
+#![cfg_attr(stage0, feature(conservative_impl_trait))]
 #![feature(iter_rfind)]
 #![feature(iter_rfold)]
 #![feature(iterator_repeat_with)]