generator.c: fix infinite recursion

* ext/json/generator/generator.c (generate_json): get rid of
  unnecessary recursive calls which can cause infinite recursion.
  T_STRING may not have rb_cString.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49562 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/ext/json/generator/generator.c b/ext/json/generator/generator.c
index 7805cde960..9641ecbb58 100644
--- a/ext/json/generator/generator.c
+++ b/ext/json/generator/generator.c
@@ -880,7 +880,7 @@ static void generate_json(FBuffer *buffer, VALUE Vstate, JSON_Generator_State *s
     } else {
         tmp = rb_funcall(obj, i_to_s, 0);
         Check_Type(tmp, T_STRING);
-        generate_json(buffer, Vstate, state, tmp);
+        generate_json_string(buffer, Vstate, state, tmp);
     }
 }