ruby-amqp/bunny — pull request #122 by timblair (2013-05-16 15:15:49+00:00)
Title: IO::WaitReadable is 1.9+ only

As `IO::WaitReadable` is 1.9+ only, e77acfe965584e7c4ed8e8740e7bf4add4cf2b1e breaks 1.8.7 compatibility. This change ensures we only handle `IO::WaitReadable` exceptions if we know what they are.