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-rw-r--r--compiler/rustc_feature/src/active.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_feature/src/active.rs b/compiler/rustc_feature/src/active.rs
index 56a2c5eff3d..c03789f500a 100644
--- a/compiler/rustc_feature/src/active.rs
+++ b/compiler/rustc_feature/src/active.rs
@@ -379,6 +379,8 @@ declare_features! (
     (active, deprecated_safe, "1.61.0", Some(94978), None),
     /// Allows having using `suggestion` in the `#[deprecated]` attribute.
     (active, deprecated_suggestion, "1.61.0", Some(94785), None),
+    /// Allows using the `#[diagnostic]` attribute tool namespace
+    (active, diagnostic_namespace, "CURRENT_RUSTC_VERSION", Some(94785), None),
     /// Controls errors in trait implementations.
     (active, do_not_recommend, "1.67.0", Some(51992), None),
     /// Tells rustdoc to automatically generate `#[doc(cfg(...))]`.