3 files changed, 19 insertions, 8 deletions
diff --git a/include/mruby/hash.h b/include/mruby/hash.h
index 7a16d7b5a..f3755eb25 100644
--- a/include/mruby/hash.h
+++ b/include/mruby/hash.h
@@ -26,10 +26,7 @@ mrb_value mrb_hash_new(mrb_state *mrb);
 void mrb_hash_set(mrb_state *mrb, mrb_value hash, mrb_value key, mrb_value val);
 mrb_value mrb_hash_get(mrb_state *mrb, mrb_value hash, mrb_value key);
 mrb_value mrb_hash_fetch(mrb_state *mrb, mrb_value hash, mrb_value key, mrb_value def);
-mrb_value mrb_hash_delete_key(mrb_state *mrb, mrb_value hash, mrb_value key);
-mrb_value mrb_hash_keys(mrb_state *mrb, mrb_value hash);
 mrb_value mrb_hash(mrb_state *mrb, mrb_value obj);
-mrb_value mrb_check_hash_type(mrb_state *mrb, mrb_value self);
 
 /* RHASH_TBL allocates st_table if not available. */
 #define RHASH(obj)   ((struct RHash*)((obj).value.p))
diff --git a/src/hash.c b/src/hash.c
index 5d3835019..927e40e66 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -488,7 +488,7 @@ mrb_hash_set_default_proc(mrb_state *mrb, mrb_value hash)
   return ifnone;
 }
 
-mrb_value
+static mrb_value
 mrb_hash_delete_key(mrb_state *mrb, mrb_value hash, mrb_value key)
 {
   khash_t(ht) *h = RHASH_TBL(hash);
@@ -965,7 +965,7 @@ mrb_hash_to_hash(mrb_state *mrb, mrb_value hash)
  *
  */
 
-mrb_value
+static mrb_value
 mrb_hash_keys(mrb_state *mrb, mrb_value hash)
 {
   khash_t(ht) *h = RHASH_TBL(hash);
diff --git a/test/driver.c b/test/driver.c
index 4fe58432d..d2ad31b26 100644
--- a/test/driver.c
+++ b/test/driver.c
@@ -11,6 +11,7 @@
 #include <mruby/proc.h>
 #include <mruby/data.h>
 #include <mruby/compile.h>
+#include <mruby/variable.h>
 
 void
 mrb_init_mrbtest(mrb_state *);
@@ -23,12 +24,24 @@ void print_hint(void)
   printf("Thanks :)\n\n");
 }
 
+static int
+check_error(mrb_state *mrb)
+{
+  /* Error check */
+  /* $ko_test and $kill_test should be 0 */
+  mrb_value ko_test = mrb_gv_get(mrb, mrb_intern(mrb, "$ko_test"));
+  mrb_value kill_test = mrb_gv_get(mrb, mrb_intern(mrb, "$kill_test"));
+
+  return FIXNUM_P(ko_test) && mrb_fixnum(ko_test) == 0 && FIXNUM_P(kill_test) && mrb_fixnum(kill_test) == 0;
+}
+
 int
 main(void)
 {
   mrb_state *mrb;
   mrb_value return_value;
   const char *prog = "report()";
+  int ret = EXIT_SUCCESS;
 
   print_hint();
 
@@ -46,11 +59,12 @@ main(void)
   if (mrb->exc) {
     mrb_p(mrb, return_value);
     mrb->exc = 0;
+    ret = EXIT_FAILURE;
   }
-  else {
-    /* no */
+  else if (!check_error(mrb)) {
+    ret = EXIT_FAILURE;
   }
   mrb_close(mrb);
 
-  return EXIT_SUCCESS;
+  return ret;
 }