ext/dartsclone/dartscloneext.hpp in dartsclone-0.2.2 vs ext/dartsclone/dartscloneext.hpp in dartsclone-0.2.3

@@ -236,9 +236,10 @@
 
       VALUE ret = rb_hash_new();
       rb_hash_aset(ret, ID2SYM(rb_intern("value")), INT2NUM(value));
       rb_hash_aset(ret, ID2SYM(rb_intern("node_pos")), INT2NUM((int)node_pos));
       rb_hash_aset(ret, ID2SYM(rb_intern("key_pos")), INT2NUM((int)key_pos));
+      RB_GC_GUARD(_key);
       return ret;
     };
 
     static VALUE _double_array_unit_size(VALUE self) {
       return INT2NUM((int)(get_double_array(self)->unit_size()));