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-rw-r--r--compiler/rustc_span/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
index 7bbab34c69a..97cb734619e 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -20,6 +20,7 @@
#![feature(min_specialization)]
#![feature(rustc_attrs)]
#![feature(let_chains)]
+#![feature(round_char_boundary)]
#![deny(rustc::untranslatable_diagnostic)]
#![deny(rustc::diagnostic_outside_of_impl)]