Disallow attributes on alias declarations

src/check_decl.cpp

@@ -391,8 +391,18 @@ void check_const_decl(CheckerContext *ctx, Entity *e, Ast *type_expr, Ast *init,
 			case Entity_Procedure:
 			case Entity_LibraryName:
 			case Entity_ImportName:
-				override_entity_in_scope(e, entity);
+				{
-				return;
+					override_entity_in_scope(e, entity);
+
+					DeclInfo *decl = decl_info_of_entity(e);
+					if (decl != nullptr) {
+						if (decl->attributes.count > 0) {
+							error(decl->attributes[0], "Constant alias declarations cannot have attributes");
+						}
+					}
+
+					return;
+				}
 			}
 		}
 	}