1 files changed, 3 insertions, 8 deletions
diff --git a/mrbgems/mruby-class-ext/src/class.c b/mrbgems/mruby-class-ext/src/class.c
index 705db9949..0d27c30ed 100644
--- a/mrbgems/mruby-class-ext/src/class.c
+++ b/mrbgems/mruby-class-ext/src/class.c
@@ -5,14 +5,13 @@
 static mrb_value
 mrb_mod_name(mrb_state *mrb, mrb_value self)
 {
-  mrb_value name = mrb_class_path(mrb, mrb_class_ptr(self));
-  return mrb_nil_p(name)? name : mrb_str_dup(mrb, name);
+  return mrb_class_path(mrb, mrb_class_ptr(self));
 }
 
 static mrb_value
 mrb_mod_singleton_class_p(mrb_state *mrb, mrb_value self)
 {
-  return mrb_bool_value(mrb_type(self) == MRB_TT_SCLASS);
+  return mrb_bool_value(mrb_sclass_p(self));
 }
 
 /*
@@ -41,11 +40,7 @@ mrb_mod_module_exec(mrb_state *mrb, mrb_value self)
   mrb_int argc;
   mrb_value blk;
 
-  mrb_get_args(mrb, "*&", &argv, &argc, &blk);
-
-  if (mrb_nil_p(blk)) {
-    mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given");
-  }
+  mrb_get_args(mrb, "*&!", &argv, &argc, &blk);
 
   mrb->c->ci->target_class = mrb_class_ptr(self);
   return mrb_yield_cont(mrb, blk, self, argc, argv);