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-rw-r--r--src/libcore/macros.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index 09d2331b60f..ba641f7dc5c 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -300,6 +300,7 @@ macro_rules! debug_assert_ne {
 ///     Ok(())
 /// }
 /// ```
+#[rustc_deprecated(since = "1.38.0", reason = "use the `?` operator instead")]
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[doc(alias = "?")]