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-rw-r--r--compiler/rustc_parse/src/validate_attr.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_parse/src/validate_attr.rs b/compiler/rustc_parse/src/validate_attr.rs
index cca621103b5..f040fed7162 100644
--- a/compiler/rustc_parse/src/validate_attr.rs
+++ b/compiler/rustc_parse/src/validate_attr.rs
@@ -285,6 +285,9 @@ pub fn check_builtin_meta_item(
                 | sym::rustc_do_not_implement_via_object
                 | sym::rustc_coinductive
                 | sym::const_trait
+                | sym::stable
+                | sym::unstable
+                | sym::rustc_allowed_through_unstable_modules
                 | sym::rustc_specialization_trait
                 | sym::rustc_unsafe_specialization_marker
                 | sym::rustc_allow_incoherent_impl