Early failure of originate on Asterisk is not handled

[benlangfeld]

Adhearsion::OutboundCall.originate 'sip:arabbit@mojolingo.com', from: 'sip:foo@bar.com'

[2014-03-16 13:54:57.540] DEBUG Adhearsion::OutboundCall: @: Executing command #<Punchblock::Command::Dial target_call_id=nil, target_mixer_name=nil, component_id=nil, source_uri=nil, domain=nil, transport=nil, timestamp=Sun, 16 Mar 2014 13:54:57 +0100, request_id="3b111abc-9b25-4cbb-b903-0378e13e0524", headers={}, to="sip:arabbit@mojolingo.com", from="sip:foo@bar.com", uri=nil, timeout=nil, join=nil>

[2014-03-16 13:54:57.760] TRACE Punchblock::Connection::Asterisk: [SEND] Action: originate
ActionID: 8f35b656-fd51-4d76-bfa8-ba9bfb6fb372
Async: true
Context: adhearsion-redirect
Exten: 1
Priority: 1
Channel: sip:arabbit@mojolingo.com
Callerid: sip:foo@bar.com
Variable: punchblock_call_id=bd8f97ce-3045-489d-b77c-a64b71c5eab8

[2014-03-16 13:54:57.784] TRACE Punchblock::Connection::Asterisk: [RECV] Response: Error
ActionID: 8f35b656-fd51-4d76-bfa8-ba9bfb6fb372
Message: Invalid channel

[2014-03-16 13:54:57.785] TRACE Punchblock::Connection::Asterisk: [RECV] #<RubyAMI::Error message="Invalid channel", headers=>

=> #<Adhearsion::OutboundCall:bd8f97ce-3045-489d-b77c-a64b71c5eab8@ offer=nil, end_reason=nil, commands=[], variables={}, controllers=[], to="sip:arabbit@mojolingo.com", from="sip:foo@bar.com">