Modify mrb_name_error() to use mrb_format().

1 files changed, 2 insertions, 2 deletions

diff --git a/src/kernel.c b/src/kernel.c
index 23b0153ab..ec6408701 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -556,7 +556,7 @@ check_iv_name(mrb_state *mrb, mrb_sym id)
 
   s = mrb_sym2name_len(mrb, id, &len);
   if (len < 2 || !(s[0] == '@' && s[1] != '@')) {
-    mrb_name_error(mrb, id, "`%s' is not allowed as an instance variable name", s);
+    mrb_name_error(mrb, id, "`%S' is not allowed as an instance variable name", mrb_sym2str(mrb, id));
   }
 }
 
@@ -964,7 +964,7 @@ mrb_obj_remove_instance_variable(mrb_state *mrb, mrb_value self)
   check_iv_name(mrb, sym);
   val = mrb_iv_remove(mrb, self, sym);
   if (mrb_undef_p(val)) {
-    mrb_name_error(mrb, sym, "instance variable %s not defined", mrb_sym2name(mrb, sym));
+    mrb_name_error(mrb, sym, "instance variable %S not defined", mrb_sym2str(mrb, sym));
   }
   return val;
 }