I'm seeing the same here with lldb -version lldb-340.4.70, ionic -version 1.7.6, ios-deploy -V 1.8.2, Xcode Version 7.0.1 (7A1001) same OSX 10.10.5
To resolve I frequently killall -9 ios-deploy
Would it make sense to file an issue with ionic or not so much? Feel free if it makes sense, I don't understand the product well enough to know if that's appropriate or what component to file a bug against.