mame	2010-11-04 02:08:35 +0900 (Thu, 04 Nov 2010)

  New Revision: 29682

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=29682

  Log:
    * cont.c (fiber_t_alloc): raise an error when fiber is going to be
      initialized twice.  [ruby-dev:42524]

  Modified files:
    trunk/ChangeLog
    trunk/cont.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 29681)
+++ ChangeLog	(revision 29682)
@@ -1,3 +1,8 @@
+Thu Nov  4 02:06:16 2010  Yusuke Endoh  <mame@t...>
+
+	* cont.c (fiber_t_alloc): raise an error when fiber is going to be
+	  initialized twice.  [ruby-dev:42524]
+
 Thu Nov  4 02:04:25 2010  Yusuke Endoh  <mame@t...>
 
 	* cont.c (rb_fiber_resume): raise an "double resume" error when root
Index: cont.c
===================================================================
--- cont.c	(revision 29681)
+++ cont.c	(revision 29682)
@@ -971,6 +971,10 @@
     rb_fiber_t *fib;
     rb_thread_t *th = GET_THREAD();
 
+    if (DATA_PTR(fibval) != 0) {
+	rb_raise(rb_eRuntimeError, "cannot initialize twice");
+    }
+
     THREAD_MUST_BE_RUNNING(th);
     fib = ALLOC(rb_fiber_t);
     memset(fib, 0, sizeof(rb_fiber_t));

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