nobu	2014-05-07 13:26:44 +0900 (Wed, 07 May 2014)

  New Revision: 45853

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=45853

  Log:
    vm.c: clear intermediate hash
    
    * vm.c (rb_f_local_variables): clear intermediate hash after
      extracting its keys.

  Modified files:
    trunk/vm_eval.c
Index: vm_eval.c
===================================================================
--- vm_eval.c	(revision 45852)
+++ vm_eval.c	(revision 45853)
@@ -1887,6 +1887,7 @@ static VALUE https://github.com/ruby/ruby/blob/trunk/vm_eval.c#L1887
 rb_f_local_variables(void)
 {
     VALUE vars = rb_hash_new();
+    VALUE ary;
     rb_thread_t *th = GET_THREAD();
     rb_control_frame_t *cfp =
 	vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp));
@@ -1924,7 +1925,9 @@ rb_f_local_variables(void) https://github.com/ruby/ruby/blob/trunk/vm_eval.c#L1925
     }
     /* TODO: rb_hash_keys() directly, or something not to depend on
      * the order of st_table */
-    return rb_funcallv(vars, rb_intern("keys"), 0, 0);
+    ary = rb_funcallv(vars, rb_intern("keys"), 0, 0);
+    rb_hash_clear(vars);
+    return ary;
 }
 
 /*

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