* cont.c (fiber_switch): ignore fiber context switch

  because destination fiber is same as current fiber.
  With out this, it may segv on FreeBSD 9.
  patched by Koichi Sasada.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33804 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/test/ruby/test_fiber.rb b/test/ruby/test_fiber.rb
index 7cf4a6b119..7127a9cb12 100644
--- a/test/ruby/test_fiber.rb
+++ b/test/ruby/test_fiber.rb
@@ -188,6 +188,11 @@ class TestFiber < Test::Unit::TestCase
       f2 = Fiber.new{ f1.resume }
       f1.transfer
     }, '[ruby-dev:40833]'
+    assert_normal_exit %q{
+      require 'fiber'
+      Fiber.new{}.resume
+      1.times{Fiber.current.transfer}'
+    }
   end
 
   def test_resume_root_fiber