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-rw-r--r--library/coretests/tests/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/library/coretests/tests/lib.rs b/library/coretests/tests/lib.rs
index 7fe72862608..adceeb101ff 100644
--- a/library/coretests/tests/lib.rs
+++ b/library/coretests/tests/lib.rs
@@ -13,6 +13,7 @@
 #![feature(bigint_helper_methods)]
 #![feature(bstr)]
 #![feature(cell_update)]
+#![feature(char_max_len)]
 #![feature(clone_to_uninit)]
 #![feature(const_eval_select)]
 #![feature(const_swap_nonoverlapping)]