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-rw-r--r--src/libstd_unicode/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd_unicode/lib.rs b/src/libstd_unicode/lib.rs
index 65058b6554a..22f8bdab2f7 100644
--- a/src/libstd_unicode/lib.rs
+++ b/src/libstd_unicode/lib.rs
@@ -28,6 +28,7 @@
        issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
        test(no_crate_inject, attr(allow(unused_variables), deny(warnings))))]
 #![deny(warnings)]
+#![deny(missing_debug_implementations)]
 #![no_std]
 
 #![feature(ascii_ctype)]