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-rw-r--r--compiler/rustc_feature/src/unstable.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs
index 8add2b92761..83a50f017d3 100644
--- a/compiler/rustc_feature/src/unstable.rs
+++ b/compiler/rustc_feature/src/unstable.rs
@@ -623,6 +623,7 @@ declare_features! (
     /// Allows unsafe on extern declarations and safety qualifiers over internal items.
     (unstable, unsafe_extern_blocks, "CURRENT_RUSTC_VERSION", Some(123743)),
     /// Allows unsized fn parameters.
+    (unstable, unsafe_attributes, "CURRENT_RUSTC_VERSION", Some(123757)),
     (unstable, unsized_fn_params, "1.49.0", Some(48055)),
     /// Allows unsized rvalues at arguments and parameters.
     (incomplete, unsized_locals, "1.30.0", Some(48055)),