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-rw-r--r--src/libsyntax/lib.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index e9a6535cba1..9bbd59e09be 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -26,6 +26,7 @@
 #![feature(rustc_diagnostic_macros)]
 #![feature(slice_sort_by_cached_key)]
 #![feature(str_escape)]
+#![feature(step_trait)]
 #![feature(try_trait)]
 #![feature(unicode_internals)]
 
@@ -37,7 +38,7 @@ extern crate serialize;
 #[macro_use] extern crate log;
 pub extern crate rustc_errors as errors;
 extern crate syntax_pos;
-extern crate rustc_data_structures;
+#[macro_use] extern crate rustc_data_structures;
 extern crate rustc_target;
 #[macro_use] extern crate scoped_tls;
 #[macro_use]