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-rw-r--r--src/libsyntax/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 0184a3214b5..b0c2aa3dbb2 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -13,7 +13,7 @@
 #![feature(label_break_value)]
 #![feature(nll)]
 #![feature(try_trait)]
-#![feature(slice_patterns)]
+#![cfg_attr(bootstrap, feature(slice_patterns))]
 #![feature(unicode_internals)]
 #![recursion_limit = "256"]