Fixed Fiber.yield not propagating rescued exception.
Fixed Fiber.yield not propagating rescued exception.

nobu/rubyspec,ruby/spec,ruby/spec,sgarciac/spec,ruby/spec,nobu/rubyspec,ruby/rubyspec,eregon/rubyspec,eregon/rubyspec,sgarciac/spec,ruby/rubyspec,eregon/rubyspec,sgarciac/spec,nobu/rubyspec