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-rw-r--r--compiler/rustc_feature/src/unstable.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs
index 66c26a541f1..7e2f40d7b6f 100644
--- a/compiler/rustc_feature/src/unstable.rs
+++ b/compiler/rustc_feature/src/unstable.rs
@@ -659,6 +659,8 @@ declare_features! (
     (unstable, unsized_tuple_coercion, "1.20.0", Some(42877)),
     /// Allows using the `#[used(linker)]` (or `#[used(compiler)]`) attribute.
     (unstable, used_with_arg, "1.60.0", Some(93798)),
+    /// Allows use of attributes in `where` clauses.
+    (unstable, where_clause_attrs, "CURRENT_RUSTC_VERSION", Some(115590)),
     /// Allows use of x86 `AMX` target-feature attributes and intrinsics
     (unstable, x86_amx_intrinsics, "1.81.0", Some(126622)),
     /// Allows use of the `xop` target-feature