critical(hangs):Fiber#transfer can be invoked from the same Fiber it transfers control to
critical(hangs):Fiber#transfer raises a FiberError when transferring to a Fiber which resumes itself
unstable(intermittent):Fiber#transfer raises a LocalJumpError if the block includes a return statement
fails:Fiber#transfer can be invoked from the same Fiber it transfers control to
windows(hangs):Fiber#transfer raises a FiberError if the Fiber is dead
