nobu	2016-08-19 09:12:47 +0900 (Fri, 19 Aug 2016)

  New Revision: 55964

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=55964

  Log:
    vm.c: check TOPLEVEL_BINDING
    
    * vm.c (vm_set_main_stack): TOPLEVEL_BINDING must be built.
      http://www.viva64.com/en/b/0414/#ID0EQ1CI  [ruby-core:76973]

  Modified files:
    trunk/ChangeLog
    trunk/vm.c
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 55963)
+++ ChangeLog	(revision 55964)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Fri Aug 19 09:12:45 2016  Nobuyoshi Nakada  <nobu@r...>
+
+	* vm.c (vm_set_main_stack): TOPLEVEL_BINDING must be built.
+	  http://www.viva64.com/en/b/0414/#ID0EQ1CI  [ruby-core:76973]
+
 Fri Aug 19 01:00:53 2016  Yuichiro Kaneko  <yui-knk@r...>
 
 	* proc.c (mnew_missing): Remove an unused argument.
Index: vm.c
===================================================================
--- vm.c	(revision 55963)
+++ vm.c	(revision 55964)
@@ -459,11 +459,12 @@ vm_set_main_stack(rb_thread_t *th, const https://github.com/ruby/ruby/blob/trunk/vm.c#L459
     rb_binding_t *bind;
 
     GetBindingPtr(toplevel_binding, bind);
+    RUBY_ASSERT_MESG(bind, "TOPLEVEL_BINDING is not built");
 
     vm_set_eval_stack(th, iseq, 0, &bind->block);
 
     /* save binding */
-    if (bind && iseq->body->local_table_size > 0) {
+    if (iseq->body->local_table_size > 0) {
 	vm_bind_update_env(bind, vm_make_env_object(th, th->cfp));
     }
 }

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