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-rw-r--r--library/alloc/tests/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/library/alloc/tests/lib.rs b/library/alloc/tests/lib.rs
index 391ff04a4b8..708dfc582a7 100644
--- a/library/alloc/tests/lib.rs
+++ b/library/alloc/tests/lib.rs
@@ -3,6 +3,7 @@
 #![feature(iter_array_chunks)]
 #![feature(assert_matches)]
 #![feature(btree_extract_if)]
+#![feature(char_max_len)]
 #![feature(cow_is_borrowed)]
 #![feature(core_intrinsics)]
 #![feature(downcast_unchecked)]