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-rw-r--r--src/libcollections/lib.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcollections/lib.rs b/src/libcollections/lib.rs
index f027d074cb6..21387a1aa95 100644
--- a/src/libcollections/lib.rs
+++ b/src/libcollections/lib.rs
@@ -33,6 +33,7 @@
 #![feature(allow_internal_unstable)]
 #![feature(box_patterns)]
 #![feature(box_syntax)]
+#![cfg_attr(not(test), feature(char_escape_debug))]
 #![feature(core_intrinsics)]
 #![feature(dropck_parametricity)]
 #![feature(fmt_internals)]
@@ -48,7 +49,6 @@
 #![feature(specialization)]
 #![feature(staged_api)]
 #![feature(step_by)]
-#![feature(unboxed_closures)]
 #![feature(unicode)]
 #![feature(unique)]
 #![feature(unsafe_no_drop_flag)]