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-rw-r--r--compiler/rustc_parse/src/validate_attr.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_parse/src/validate_attr.rs b/compiler/rustc_parse/src/validate_attr.rs
index f7396598220..e6c46fc2528 100644
--- a/compiler/rustc_parse/src/validate_attr.rs
+++ b/compiler/rustc_parse/src/validate_attr.rs
@@ -186,6 +186,7 @@ fn emit_malformed_attribute(
         msg.push_str(&format!("`{code}`"));
         suggestions.push(code);
     }
+    suggestions.sort();
     if should_warn(name) {
         sess.buffer_lint(&ILL_FORMED_ATTRIBUTE_INPUT, span, ast::CRATE_NODE_ID, msg);
     } else {