nobu	2017-01-09 11:55:39 +0900 (Mon, 09 Jan 2017)

  New Revision: 57293

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=57293

  Log:
    vm_insnhelper.c: block argument at tailcall
    
    * vm_insnhelper.c (vm_call_iseq_setup_tailcall): check interrupts
      after set up the new frame, not the passed block to be clobbered
      by invoked finalizers and so on.  [ruby-core:78981] [Bug #13107]

  Modified files:
    trunk/vm_insnhelper.c
Index: vm_insnhelper.c
===================================================================
--- vm_insnhelper.c	(revision 57292)
+++ vm_insnhelper.c	(revision 57293)
@@ -1538,8 +1538,6 @@ vm_call_iseq_setup_tailcall(rb_thread_t https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L1538
     vm_pop_frame(th, cfp, cfp->ep);
     cfp = th->cfp;
 
-    RUBY_VM_CHECK_INTS(th);
-
     sp_orig = sp = cfp->sp;
 
     /* push self */
@@ -1558,6 +1556,8 @@ vm_call_iseq_setup_tailcall(rb_thread_t https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L1556
 		  iseq->body->stack_max);
 
     cfp->sp = sp_orig;
+    RUBY_VM_CHECK_INTS(th);
+
     return Qundef;
 }
 

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