lib/rbs/definition_builder/ancestor_builder.rb in rbs-2.7.0 vs lib/rbs/definition_builder/ancestor_builder.rb in rbs-2.8.0.pre.1

@@ -209,10 +209,13 @@
               super_name = BuiltinNames::Object.name
               super_args = []
             end
 
             NoSuperclassFoundError.check!(super_name, env: env, location: primary.decl.location)
+            if super_class
+              InheritModuleError.check!(super_class, env: env)
+            end
 
             ancestors = OneAncestors.class_instance(
               type_name: type_name,
               params: params,
               super_class: Definition::Ancestor::Instance.new(name: super_name, args: super_args, source: :super)
@@ -266,9 +269,12 @@
             else
               super_name = BuiltinNames::Object.name
             end
 
             NoSuperclassFoundError.check!(super_name, env: env, location: primary.decl.location)
+            if super_class
+              InheritModuleError.check!(super_class, env: env)
+            end
 
             ancestors = OneAncestors.singleton(
               type_name: type_name,
               super_class: Definition::Ancestor::Singleton.new(name: super_name)
             )