stacktrace on linux if no device connected

[ahoog42]

hiro@metaverse-oss:~/git/ios-triage$ ios-triage collect
in getUDID, retval =
Error: Please ensure an iDevice is connected via USB and authorized
at ChildProcess.udid.on.code (/home/hiro/git/ios-triage/index.js:74:18)
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at maybeClose (internal/child_process.js:885:16)
at Socket. (internal/child_process.js:334:11)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at Pipe._handle.close [as _onclose] (net.js:501:12)