* cont.c (rb_fiber_resume): raise an "double resume" error when root

  fiber is going to be resumed.  [ruby-dev:42523]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29680 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_fiber.rb b/test/ruby/test_fiber.rb
index edfe55a1d3..ec64f98229 100644
--- a/test/ruby/test_fiber.rb
+++ b/test/ruby/test_fiber.rb
@@ -189,5 +189,13 @@ class TestFiber < Test::Unit::TestCase
       f1.transfer
     }, '[ruby-dev:40833]'
   end
+
+  def test_resume_root_fiber
+    assert_raise(FiberError) do
+      Thread.new do
+        Fiber.current.resume
+      end.join
+    end
+  end
 end