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Closed
Created by Iain Learmonth@irl

Segfault in proxy-go

It happened quite quickly, so here's the full output.

2019/04/16 [scrubbed] starting
INFO: configuration.go:174: Created Configuration at  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f65bc000c60 1} 0x7f65bc000c60
INFO: peerconnection.go:436: fired OnSignalingStateChange:  1 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  1 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  1
INFO: peerconnection.go:495: fired OnConnectionStateChange:  1
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 1
INFO: peerconnection.go:459: fired OnIceCandidate:  1 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 39908 typ host generation 0 ufrag gUW/ network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  1 candidate:498995695 1 udp 2122194687 172.22.152.130 59852 typ host generation 0 ufrag gUW/ network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  1 candidate:3509792380 1 udp 1685987071 84.92.41.201 59913 typ srflx raddr 172.22.152.130 rport 59852 generation 0 ufrag gUW/ network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  1 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 34045 typ host tcptype passive generation 0 ufrag gUW/ network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  1 candidate:1396567327 1 tcp 1518214911 172.22.152.130 54255 typ host tcptype passive generation 0 ufrag gUW/ network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 1
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  1
INFO: peerconnection.go:495: fired OnConnectionStateChange:  1
INFO: peerconnection.go:527: fired OnDataChannel:  1 0x7f6584008960
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] connected to relay
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f6580000b20 2} 0x7f6580000b20
INFO: peerconnection.go:436: fired OnSignalingStateChange:  2 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  2 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  2
INFO: peerconnection.go:495: fired OnConnectionStateChange:  2
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 2
INFO: peerconnection.go:459: fired OnIceCandidate:  2 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 59602 typ host generation 0 ufrag ZK+V network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  2 candidate:498995695 1 udp 2122194687 172.22.152.130 58452 typ host generation 0 ufrag ZK+V network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  2 candidate:3509792380 1 udp 1685987071 84.92.41.201 59538 typ srflx raddr 172.22.152.130 rport 58452 generation 0 ufrag ZK+V network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  2 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 33335 typ host tcptype passive generation 0 ufrag ZK+V network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  2 candidate:1396567327 1 tcp 1518214911 172.22.152.130 55661 typ host tcptype passive generation 0 ufrag ZK+V network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 2
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  2
INFO: peerconnection.go:495: fired OnConnectionStateChange:  2
INFO: peerconnection.go:527: fired OnDataChannel:  2 0x7f656800a310
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] connected to relay
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f658c000b20 3} 0x7f658c000b20
INFO: peerconnection.go:436: fired OnSignalingStateChange:  3 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  3 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  3
INFO: peerconnection.go:495: fired OnConnectionStateChange:  3
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 3
INFO: peerconnection.go:459: fired OnIceCandidate:  3 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 36827 typ host generation 0 ufrag Ixjw network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  3 candidate:498995695 1 udp 2122194687 172.22.152.130 47070 typ host generation 0 ufrag Ixjw network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  3 candidate:3509792380 1 udp 1685987071 84.92.41.201 62688 typ srflx raddr 172.22.152.130 rport 47070 generation 0 ufrag Ixjw network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  3 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 56747 typ host tcptype passive generation 0 ufrag Ixjw network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  3 candidate:1396567327 1 tcp 1518214911 172.22.152.130 42273 typ host tcptype passive generation 0 ufrag Ixjw network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 3
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  3
INFO: peerconnection.go:495: fired OnConnectionStateChange:  3
INFO: peerconnection.go:527: fired OnDataChannel:  3 0x7f6550001130
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] connected to relay
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f658c064d20 4} 0x7f658c064d20
INFO: peerconnection.go:436: fired OnSignalingStateChange:  4 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  4 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  4
INFO: peerconnection.go:495: fired OnConnectionStateChange:  4
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 4
INFO: peerconnection.go:459: fired OnIceCandidate:  4 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 34485 typ host generation 0 ufrag TTEP network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  4 candidate:498995695 1 udp 2122194687 172.22.152.130 45068 typ host generation 0 ufrag TTEP network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  4 candidate:3509792380 1 udp 1685987071 84.92.41.201 51346 typ srflx raddr 172.22.152.130 rport 45068 generation 0 ufrag TTEP network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  4 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 47037 typ host tcptype passive generation 0 ufrag TTEP network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  4 candidate:1396567327 1 tcp 1518214911 172.22.152.130 41629 typ host tcptype passive generation 0 ufrag TTEP network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 4
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  4
INFO: peerconnection.go:495: fired OnConnectionStateChange:  4
INFO: peerconnection.go:527: fired OnDataChannel:  4 0x7f654000ad40
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] connected to relay
2019/04/16 [scrubbed] OnClose channel
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  1
INFO: peerconnection.go:436: fired OnSignalingStateChange:  1 Closed
2019/04/16 [scrubbed] datachannelHandler ends
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f6580064f40 5} 0x7f6580064f40
INFO: peerconnection.go:436: fired OnSignalingStateChange:  5 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  5 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  5
INFO: peerconnection.go:495: fired OnConnectionStateChange:  5
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 5
INFO: peerconnection.go:459: fired OnIceCandidate:  5 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 35400 typ host generation 0 ufrag qYdh network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  5 candidate:498995695 1 udp 2122194687 172.22.152.130 39835 typ host generation 0 ufrag qYdh network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  5 candidate:3509792380 1 udp 1685987071 84.92.41.201 63045 typ srflx raddr 172.22.152.130 rport 39835 generation 0 ufrag qYdh network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  5 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 55769 typ host tcptype passive generation 0 ufrag qYdh network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  5 candidate:1396567327 1 tcp 1518214911 172.22.152.130 55571 typ host tcptype passive generation 0 ufrag qYdh network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 5
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  5
INFO: peerconnection.go:495: fired OnConnectionStateChange:  5
INFO: peerconnection.go:527: fired OnDataChannel:  5 0x7f658400af30
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] connected to relay
2019/04/16 [scrubbed] OnClose channel
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  2
INFO: peerconnection.go:436: fired OnSignalingStateChange:  2 Closed
2019/04/16 [scrubbed] datachannelHandler ends
2019/04/16 [scrubbed] OnClose channel
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  3
INFO: peerconnection.go:436: fired OnSignalingStateChange:  3 Closed
2019/04/16 [scrubbed] datachannelHandler ends
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f6580061920 6} 0x7f6580061920
INFO: peerconnection.go:436: fired OnSignalingStateChange:  6 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  6 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  6
INFO: peerconnection.go:495: fired OnConnectionStateChange:  6
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 6
INFO: peerconnection.go:459: fired OnIceCandidate:  6 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 59583 typ host generation 0 ufrag eVKt network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  6 candidate:498995695 1 udp 2122194687 172.22.152.130 47513 typ host generation 0 ufrag eVKt network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  6 candidate:3509792380 1 udp 1685987071 84.92.41.201 50031 typ srflx raddr 172.22.152.130 rport 47513 generation 0 ufrag eVKt network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  6 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 59003 typ host tcptype passive generation 0 ufrag eVKt network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  6 candidate:1396567327 1 tcp 1518214911 172.22.152.130 49119 typ host tcptype passive generation 0 ufrag eVKt network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 6
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  6
INFO: peerconnection.go:495: fired OnConnectionStateChange:  6
INFO: peerconnection.go:527: fired OnDataChannel:  6 0x7f655000adf0
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] connected to relay
INFO: configuration.go:256: Converting Config:  &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f6580000b20 7} 0x7f6580000b20
INFO: peerconnection.go:436: fired OnSignalingStateChange:  7 HaveRemoteOffer
2019/04/16 [scrubbed] sdp offer successfully received.
2019/04/16 [scrubbed] Generating answer...
INFO: peerconnection.go:436: fired OnSignalingStateChange:  7 Stable
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  7
INFO: peerconnection.go:495: fired OnConnectionStateChange:  7
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 7
INFO: peerconnection.go:459: fired OnIceCandidate:  7 candidate:1020330603 1 udp 2122262783 2001:470:1d58:1337:2066:3507:9c2e:9cc8 50955 typ host generation 0 ufrag cbJC network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  7 candidate:498995695 1 udp 2122194687 172.22.152.130 39725 typ host generation 0 ufrag cbJC network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  7 candidate:3509792380 1 udp 1685987071 84.92.41.201 60984 typ srflx raddr 172.22.152.130 rport 39725 generation 0 ufrag cbJC network-id 1 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  7 candidate:1918041755 1 tcp 1518283007 2001:470:1d58:1337:2066:3507:9c2e:9cc8 49269 typ host tcptype passive generation 0 ufrag cbJC network-id 2 network-cost 50
INFO: peerconnection.go:459: fired OnIceCandidate:  7 candidate:1396567327 1 tcp 1518214911 172.22.152.130 35571 typ host tcptype passive generation 0 ufrag cbJC network-id 1 network-cost 50
INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 7
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  7
INFO: peerconnection.go:495: fired OnConnectionStateChange:  7
INFO: peerconnection.go:527: fired OnDataChannel:  7 0x7f6544008100
2019/04/16 [scrubbed] OnDataChannel
2019/04/16 [scrubbed] OnOpen channel
2019/04/16 [scrubbed] OnMessage <--- 200 bytes
2019/04/16 [scrubbed] connected to relay
2019/04/16 [scrubbed] Write 754 bytes --> WebRTC
2019/04/16 [scrubbed] OnMessage <--- 126 bytes
2019/04/16 [scrubbed] Write 51 bytes --> WebRTC
2019/04/16 [scrubbed] OnMessage <--- 40 bytes
2019/04/16 [scrubbed] Write 1524 bytes --> WebRTC
2019/04/16 [scrubbed] OnMessage <--- 1057 bytes
2019/04/16 [scrubbed] Write 543 bytes --> WebRTC
2019/04/16 [scrubbed] OnClose channel
INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  4
INFO: peerconnection.go:436: fired OnSignalingStateChange:  4 Closed
2019/04/16 [scrubbed] datachannelHandler ends
2019/04/16 [scrubbed] broker returns: 504
fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x66a11a]

runtime stack:
runtime.throw(0xeea8ff, 0x2a)
	/usr/lib/go-1.11/src/runtime/panic.go:608 +0x72
runtime.sigpanic()
	/usr/lib/go-1.11/src/runtime/signal_unix.go:374 +0x2f2

goroutine 43 [syscall]:
runtime.cgocall(0x668210, 0xc000249748, 0xc0004c8300)
	/usr/lib/go-1.11/src/runtime/cgocall.go:128 +0x5e fp=0xc000249718 sp=0xc0002496e0 pc=0x41c51e
github.com/keroserene/go-webrtc._Cfunc_CGO_IceConnectionState(0x7f65bc000c60, 0x7f6500000000)
	_cgo_gotypes.go:555 +0x49 fp=0xc000249748 sp=0xc000249718 pc=0x6578f9
github.com/keroserene/go-webrtc.(*PeerConnection).ConnectionState.func1(0x7f65bc000c60, 0xc000270101)
	/home/irl/go/src/github.com/keroserene/go-webrtc/peerconnection.go:286 +0x56 fp=0xc000249780 sp=0xc000249748 pc=0x65cd26
github.com/keroserene/go-webrtc.(*PeerConnection).ConnectionState(0xc0000d62c0, 0x0)
	/home/irl/go/src/github.com/keroserene/go-webrtc/peerconnection.go:286 +0x32 fp=0xc0002497a0 sp=0xc000249780 pc=0x65aba2
main.makePeerConnectionFromOffer.func3(0xc0000d62c0)
	/tmp/snowflake/proxy-go/snowflake.go:339 +0x59 fp=0xc0002497d8 sp=0xc0002497a0 pc=0x667179
runtime.goexit()
	/usr/lib/go-1.11/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc0002497e0 sp=0xc0002497d8 pc=0x46ff51
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 1 [select]:
net/http.(*http2ClientConn).roundTrip(0xc000346c40, 0xc0004c0000, 0x0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:7665 +0x7cc
net/http.(*http2Transport).RoundTripOpt(0xc0000aa410, 0xc0004c0000, 0x0, 0x30000c0002c212b, 0x42ac1c, 0xedebef)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:7037 +0x153
net/http.(*http2Transport).RoundTrip(0xc0000aa410, 0xc0004c0000, 0xc0004d6240, 0x128e310, 0x0)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:6999 +0x3a
net/http.http2noDialH2RoundTripper.RoundTrip(0xc0000aa410, 0xc0004c0000, 0xc0004ce540, 0x5, 0xc0000c1168)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:1019 +0x39
net/http.(*Transport).roundTrip(0x128e380, 0xc0004c0000, 0x203000, 0xc000129a30, 0x5fd22d)
	/usr/lib/go-1.11/src/net/http/transport.go:415 +0xd4c
net/http.(*Transport).RoundTrip(0x128e380, 0xc0004c0000, 0x128e380, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/http/roundtrip.go:17 +0x35
net/http.send(0xc0004c0000, 0xf27f60, 0x128e380, 0x0, 0x0, 0x0, 0xc00000e040, 0x7f65e649b440, 0xc000129ac0, 0x1)
	/usr/lib/go-1.11/src/net/http/client.go:250 +0x14b
net/http.(*Client).send(0x12c01a0, 0xc0004c0000, 0x0, 0x0, 0x0, 0xc00000e040, 0x0, 0x1, 0xc0001eb500)
	/usr/lib/go-1.11/src/net/http/client.go:174 +0xfa
net/http.(*Client).do(0x12c01a0, 0xc0004c0000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/http/client.go:641 +0x2a8
net/http.(*Client).Do(0x12c01a0, 0xc0004c0000, 0xc, 0xc000374280, 0x16)
	/usr/lib/go-1.11/src/net/http/client.go:509 +0x35
main.pollOffer(0xc000374280, 0x16, 0x0)
	/tmp/snowflake/proxy-go/snowflake.go:157 +0x37f
main.runSession(0xc000374280, 0x16)
	/tmp/snowflake/proxy-go/snowflake.go:351 +0x39
main.main()
	/tmp/snowflake/proxy-go/snowflake.go:423 +0x5ba

goroutine 80 [semacquire]:
sync.runtime_Semacquire(0xc0002dd768)
	/usr/lib/go-1.11/src/runtime/sema.go:56 +0x39
sync.(*WaitGroup).Wait(0xc0002dd760)
	/usr/lib/go-1.11/src/sync/waitgroup.go:130 +0x64
main.CopyLoopTimeout(0xf2b6e0, 0xc0001ad2f0, 0xf2b680, 0xc0001743f0, 0xdf8475800)
	/tmp/snowflake/proxy-go/snowflake.go:223 +0x253
main.datachannelHandler(0xc0001ad2f0, 0xf29660, 0xc0001ad380)
	/tmp/snowflake/proxy-go/snowflake.go:258 +0x383
created by main.makePeerConnectionFromOffer.func2
	/tmp/snowflake/proxy-go/snowflake.go:303 +0x2ac

goroutine 12 [IO wait]:
internal/poll.runtime_pollWait(0x7f65e1a49f00, 0x72, 0xc000231870)
	/usr/lib/go-1.11/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc0001d6098, 0x72, 0xffffffffffffff00, 0xf28a00, 0x12940d0)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc0001d6098, 0xc0001f6000, 0x1000, 0x1000)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc0001d6080, 0xc0001f6000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc0001d6080, 0xc0001f6000, 0x1000, 0x1000, 0x421cdb, 0x1290d00, 0xe943e0)
	/usr/lib/go-1.11/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc0001bc010, 0xc0001f6000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/net.go:177 +0x68
crypto/tls.(*block).readFromUntil(0xc0001ac1e0, 0xf27f00, 0xc0001bc010, 0x5, 0xc0001bc010, 0x0)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:492 +0x89
crypto/tls.(*Conn).readRecord(0xc0001ea000, 0xef3617, 0xc0001ea120, 0x0)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:593 +0xdd
crypto/tls.(*Conn).Read(0xc0001ea000, 0xc00016b000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:1145 +0xf1
bufio.(*Reader).Read(0xc0001b4ba0, 0xc0005443b8, 0x9, 0x9, 0x100000000000009, 0x0, 0x10)
	/usr/lib/go-1.11/src/bufio/bufio.go:216 +0x22f
io.ReadAtLeast(0xf27ba0, 0xc0001b4ba0, 0xc0005443b8, 0x9, 0x9, 0x9, 0xc0004d6180, 0x10, 0xeb7a40)
	/usr/lib/go-1.11/src/io/io.go:310 +0x88
io.ReadFull(0xf27ba0, 0xc0001b4ba0, 0xc0005443b8, 0x9, 0x9, 0xf4b1a374b92e2501, 0x3, 0xc000024570)
	/usr/lib/go-1.11/src/io/io.go:329 +0x58
net/http.http2readFrameHeader(0xc0005443b8, 0x9, 0x9, 0xf27ba0, 0xc0001b4ba0, 0x0, 0x0, 0xc00026f3a0, 0xc000231db8)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:1545 +0x7b
net/http.(*http2Framer).ReadFrame(0xc000544380, 0xc00026f3a0, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:1803 +0xa3
net/http.(*http2clientConnReadLoop).run(0xc000231fb8, 0xef3098, 0xc00048b7b8)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:8263 +0x9e
net/http.(*http2ClientConn).readLoop(0xc000346c40)
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:8191 +0x76
created by net/http.(*http2Transport).newClientConn
	/usr/lib/go-1.11/src/net/http/h2_bundle.go:7264 +0x636

goroutine 81 [IO wait]:
internal/poll.runtime_pollWait(0x7f65e1a49e30, 0x72, 0xc00022c8d0)
	/usr/lib/go-1.11/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000020d98, 0x72, 0xffffffffffffff00, 0xf28a00, 0x12940d0)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000020d98, 0xc000525400, 0x400, 0x400)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc000020d80, 0xc000525400, 0x400, 0x400, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc000020d80, 0xc000525400, 0x400, 0x400, 0x421cdb, 0x1290d00, 0xe943e0)
	/usr/lib/go-1.11/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc00000e188, 0xc000525400, 0x400, 0x400, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/net.go:177 +0x68
crypto/tls.(*block).readFromUntil(0xc0001ad440, 0xf27f00, 0xc00000e188, 0x5, 0xc00000e188, 0x3)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:492 +0x89
crypto/tls.(*Conn).readRecord(0xc0004ae380, 0xef3617, 0xc0004ae4a0, 0x40)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:593 +0xdd
crypto/tls.(*Conn).Read(0xc0004ae380, 0xc000415000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:1145 +0xf1
bufio.(*Reader).fill(0xc000076ea0)
	/usr/lib/go-1.11/src/bufio/bufio.go:100 +0x10f
bufio.(*Reader).ReadByte(0xc000076ea0, 0xc0000ab3b0, 0x49c332, 0xc000020d80)
	/usr/lib/go-1.11/src/bufio/bufio.go:242 +0x39
golang.org/x/net/websocket.hybiFrameReaderFactory.NewFrameReader(0xc000076ea0, 0xef3600, 0xc000174418, 0xbf25b0e43acddb06, 0x170eb2420c)
	/home/irl/go/src/golang.org/x/net/websocket/hybi.go:123 +0x60
golang.org/x/net/websocket.(*Conn).Read(0xc0001743f0, 0xc00060e000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/home/irl/go/src/golang.org/x/net/websocket/websocket.go:197 +0x1b1
main.timeoutConn.Read(0xf2b680, 0xc0001743f0, 0xdf8475800, 0xc00060e000, 0x8000, 0x8000, 0xe78f60, 0x1, 0xc00060e000)
	/tmp/snowflake/proxy-go/snowflake.go:198 +0x99
io.copyBuffer(0x7f65e1a4a518, 0xc0002c46a0, 0x7f65e1a4a538, 0xc0002c46c0, 0xc00060e000, 0x8000, 0x8000, 0xeb7080, 0x0, 0x7f65e1a4a538)
	/usr/lib/go-1.11/src/io/io.go:402 +0x125
io.Copy(0x7f65e1a4a518, 0xc0002c46a0, 0x7f65e1a4a538, 0xc0002c46c0, 0xc0002c46c0, 0xc000118300, 0x5348fe)
	/usr/lib/go-1.11/src/io/io.go:364 +0x5a
main.CopyLoopTimeout.func1(0xf2a660, 0xc0002c46a0, 0xf2a660, 0xc0002c46c0)
	/tmp/snowflake/proxy-go/snowflake.go:216 +0xd2
created by main.CopyLoopTimeout
	/tmp/snowflake/proxy-go/snowflake.go:221 +0x16d

goroutine 71 [chan receive]:
main.makePeerConnectionFromOffer.func3(0xc0000d6580)
	/tmp/snowflake/proxy-go/snowflake.go:338 +0x4b
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 78 [chan receive]:
main.makePeerConnectionFromOffer.func3(0xc0000d66e0)
	/tmp/snowflake/proxy-go/snowflake.go:338 +0x4b
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 69 [chan receive]:
main.makePeerConnectionFromOffer.func3(0xc0000d6370)
	/tmp/snowflake/proxy-go/snowflake.go:338 +0x4b
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 105 [select]:
io.(*pipe).Read(0xc0000aa140, 0xc0000b0000, 0x8000, 0x8000, 0x1b, 0x1b, 0xc000374660)
	/usr/lib/go-1.11/src/io/pipe.go:50 +0xea
io.(*PipeReader).Read(0xc000206000, 0xc0000b0000, 0x8000, 0x8000, 0x0, 0xf27d80, 0xc0002ec240)
	/usr/lib/go-1.11/src/io/pipe.go:127 +0x4c
main.(*webRTCConn).Read(0xc0001ac000, 0xc0000b0000, 0x8000, 0x8000, 0xf27d80, 0xc0002ec240, 0x12c0400)
	/tmp/snowflake/proxy-go/snowflake.go:77 +0x4d
main.timeoutConn.Read(0xf2b6e0, 0xc0001ac000, 0xdf8475800, 0xc0000b0000, 0x8000, 0x8000, 0x421, 0x0, 0x0)
	/tmp/snowflake/proxy-go/snowflake.go:198 +0x99
io.copyBuffer(0x7f65e1a4a518, 0xc0002d2060, 0x7f65e1a4a538, 0xc0002d2080, 0xc0000b0000, 0x8000, 0x8000, 0xeb7080, 0xc000576200, 0x7f65e1a4a538)
	/usr/lib/go-1.11/src/io/io.go:402 +0x125
io.Copy(0x7f65e1a4a518, 0xc0002d2060, 0x7f65e1a4a538, 0xc0002d2080, 0xc0002d2080, 0x0, 0x0)
	/usr/lib/go-1.11/src/io/io.go:364 +0x5a
main.CopyLoopTimeout.func1(0xf2a660, 0xc0002d2060, 0xf2a660, 0xc0002d2080)
	/tmp/snowflake/proxy-go/snowflake.go:216 +0xd2
created by main.CopyLoopTimeout
	/tmp/snowflake/proxy-go/snowflake.go:222 +0x245

goroutine 102 [chan receive]:
main.makePeerConnectionFromOffer.func3(0xc00040e0b0)
	/tmp/snowflake/proxy-go/snowflake.go:338 +0x4b
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 117 [semacquire]:
sync.runtime_Semacquire(0xc00026e678)
	/usr/lib/go-1.11/src/runtime/sema.go:56 +0x39
sync.(*WaitGroup).Wait(0xc00026e670)
	/usr/lib/go-1.11/src/sync/waitgroup.go:130 +0x64
main.CopyLoopTimeout(0xf2b6e0, 0xc0003ff8f0, 0xf2b680, 0xc0002a8630, 0xdf8475800)
	/tmp/snowflake/proxy-go/snowflake.go:223 +0x253
main.datachannelHandler(0xc0003ff8f0, 0xf29660, 0xc0003ff980)
	/tmp/snowflake/proxy-go/snowflake.go:258 +0x383
created by main.makePeerConnectionFromOffer.func2
	/tmp/snowflake/proxy-go/snowflake.go:303 +0x2ac

goroutine 82 [select]:
io.(*pipe).Read(0xc0000aaa00, 0xc000606000, 0x8000, 0x8000, 0x1b, 0x1b, 0xc000357480)
	/usr/lib/go-1.11/src/io/pipe.go:50 +0xea
io.(*PipeReader).Read(0xc00000e178, 0xc000606000, 0x8000, 0x8000, 0x0, 0xf27d80, 0xc0003175e0)
	/usr/lib/go-1.11/src/io/pipe.go:127 +0x4c
main.(*webRTCConn).Read(0xc0001ad2f0, 0xc000606000, 0x8000, 0x8000, 0xf27d80, 0xc0003175e0, 0x12c0400)
	/tmp/snowflake/proxy-go/snowflake.go:77 +0x4d
main.timeoutConn.Read(0xf2b6e0, 0xc0001ad2f0, 0xdf8475800, 0xc000606000, 0x8000, 0x8000, 0xe78f60, 0x1, 0xc000606000)
	/tmp/snowflake/proxy-go/snowflake.go:198 +0x99
io.copyBuffer(0x7f65e1a4a518, 0xc0002c46e0, 0x7f65e1a4a538, 0xc0002c4700, 0xc000606000, 0x8000, 0x8000, 0xeb7080, 0x0, 0x7f65e1a4a538)
	/usr/lib/go-1.11/src/io/io.go:402 +0x125
io.Copy(0x7f65e1a4a518, 0xc0002c46e0, 0x7f65e1a4a538, 0xc0002c4700, 0xc0002c4700, 0x0, 0x0)
	/usr/lib/go-1.11/src/io/io.go:364 +0x5a
main.CopyLoopTimeout.func1(0xf2a660, 0xc0002c46e0, 0xf2a660, 0xc0002c4700)
	/tmp/snowflake/proxy-go/snowflake.go:216 +0xd2
created by main.CopyLoopTimeout
	/tmp/snowflake/proxy-go/snowflake.go:222 +0x245

goroutine 100 [chan receive]:
main.makePeerConnectionFromOffer.func3(0xc00040e210)
	/tmp/snowflake/proxy-go/snowflake.go:338 +0x4b
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 104 [IO wait]:
internal/poll.runtime_pollWait(0x7f65e1a49d60, 0x72, 0xc00054b8d0)
	/usr/lib/go-1.11/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000020498, 0x72, 0xffffffffffffff00, 0xf28a00, 0x12940d0)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000020498, 0xc0002e6000, 0x800, 0x800)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc000020480, 0xc0002e6000, 0x800, 0x800, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc000020480, 0xc0002e6000, 0x800, 0x800, 0x421cdb, 0x1290d00, 0xe943e0)
	/usr/lib/go-1.11/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc0001dc048, 0xc0002e6000, 0x800, 0x800, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/net.go:177 +0x68
crypto/tls.(*block).readFromUntil(0xc0000995f0, 0xf27f00, 0xc0001dc048, 0x5, 0xc0001dc048, 0x424d4f)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:492 +0x89
crypto/tls.(*Conn).readRecord(0xc0001eb880, 0xef3617, 0xc0001eb9a0, 0x40)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:593 +0xdd
crypto/tls.(*Conn).Read(0xc0001eb880, 0xc0004cc000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:1145 +0xf1
bufio.(*Reader).fill(0xc0001b4540)
	/usr/lib/go-1.11/src/bufio/bufio.go:100 +0x10f
bufio.(*Reader).ReadByte(0xc0001b4540, 0xc00053a0f0, 0x49c332, 0xc000020480)
	/usr/lib/go-1.11/src/bufio/bufio.go:242 +0x39
golang.org/x/net/websocket.hybiFrameReaderFactory.NewFrameReader(0xc0001b4540, 0x0, 0x0, 0x8001, 0x0)
	/home/irl/go/src/golang.org/x/net/websocket/hybi.go:123 +0x60
golang.org/x/net/websocket.(*Conn).Read(0xc000174120, 0xc000232000, 0x8000, 0x8000, 0x0, 0xf27d80, 0xc000010050)
	/home/irl/go/src/golang.org/x/net/websocket/websocket.go:197 +0x1b1
main.timeoutConn.Read(0xf2b680, 0xc000174120, 0xdf8475800, 0xc000232000, 0x8000, 0x8000, 0x21f, 0x0, 0x0)
	/tmp/snowflake/proxy-go/snowflake.go:198 +0x99
io.copyBuffer(0x7f65e1a4a518, 0xc0002d2020, 0x7f65e1a4a538, 0xc0002d2040, 0xc000232000, 0x8000, 0x8000, 0xeb7080, 0x0, 0x7f65e1a4a538)
	/usr/lib/go-1.11/src/io/io.go:402 +0x125
io.Copy(0x7f65e1a4a518, 0xc0002d2020, 0x7f65e1a4a538, 0xc0002d2040, 0xc0002d2040, 0xc0002ec190, 0x5348fe)
	/usr/lib/go-1.11/src/io/io.go:364 +0x5a
main.CopyLoopTimeout.func1(0xf2a660, 0xc0002d2020, 0xf2a660, 0xc0002d2040)
	/tmp/snowflake/proxy-go/snowflake.go:216 +0xd2
created by main.CopyLoopTimeout
	/tmp/snowflake/proxy-go/snowflake.go:221 +0x16d

goroutine 49 [chan receive]:
main.makePeerConnectionFromOffer.func3(0xc00040e000)
	/tmp/snowflake/proxy-go/snowflake.go:338 +0x4b
created by main.makePeerConnectionFromOffer
	/tmp/snowflake/proxy-go/snowflake.go:337 +0x35d

goroutine 118 [IO wait]:
internal/poll.runtime_pollWait(0x7f65e1a49c90, 0x72, 0xc00022a8d0)
	/usr/lib/go-1.11/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000197498, 0x72, 0xffffffffffffff00, 0xf28a00, 0x12940d0)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000197498, 0xc0001d3800, 0x400, 0x400)
	/usr/lib/go-1.11/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc000197480, 0xc0001d3800, 0x400, 0x400, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc000197480, 0xc0001d3800, 0x400, 0x400, 0x421cdb, 0x1290d00, 0xe943e0)
	/usr/lib/go-1.11/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc0001bc120, 0xc0001d3800, 0x400, 0x400, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/net/net.go:177 +0x68
crypto/tls.(*block).readFromUntil(0xc0003ffa40, 0xf27f00, 0xc0001bc120, 0x5, 0xc0001bc120, 0xc0001db301)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:492 +0x89
crypto/tls.(*Conn).readRecord(0xc0004c6a80, 0xef3617, 0xc0004c6ba0, 0x40)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:593 +0xdd
crypto/tls.(*Conn).Read(0xc0004c6a80, 0xc00061e000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/usr/lib/go-1.11/src/crypto/tls/conn.go:1145 +0xf1
bufio.(*Reader).fill(0xc0001e6cc0)
	/usr/lib/go-1.11/src/bufio/bufio.go:100 +0x10f
bufio.(*Reader).ReadByte(0xc0001e6cc0, 0xc0001dbe00, 0x49c332, 0xc000197480)
	/usr/lib/go-1.11/src/bufio/bufio.go:242 +0x39
golang.org/x/net/websocket.hybiFrameReaderFactory.NewFrameReader(0xc0001e6cc0, 0xef3600, 0xc0002a8658, 0xbf25b0e6dd49b702, 0x1980d4cc08)
	/home/irl/go/src/golang.org/x/net/websocket/hybi.go:123 +0x60
golang.org/x/net/websocket.(*Conn).Read(0xc0002a8630, 0xc000628000, 0x8000, 0x8000, 0x0, 0x0, 0x0)
	/home/irl/go/src/golang.org/x/net/websocket/websocket.go:197 +0x1b1
main.timeoutConn.Read(0xf2b680, 0xc0002a8630, 0xdf8475800, 0xc000628000, 0x8000, 0x8000, 0xe78f60, 0x1, 0xc000628000)
	/tmp/snowflake/proxy-go/snowflake.go:198 +0x99
io.copyBuffer(0x7f65e1a4a518, 0xc0002d3dc0, 0x7f65e1a4a538, 0xc0002d3de0, 0xc000628000, 0x8000, 0x8000, 0xeb7080, 0x0, 0x7f65e1a4a538)
	/usr/lib/go-1.11/src/io/io.go:402 +0x125
io.Copy(0x7f65e1a4a518, 0xc0002d3dc0, 0x7f65e1a4a538, 0xc0002d3de0, 0xc0002d3de0, 0x0, 0x0)
	/usr/lib/go-1.11/src/io/io.go:364 +0x5a
main.CopyLoopTimeout.func1(0xf2a660, 0xc0002d3dc0, 0xf2a660, 0xc0002d3de0)
	/tmp/snowflake/proxy-go/snowflake.go:216 +0xd2
created by main.CopyLoopTimeout
	/tmp/snowflake/proxy-go/snowflake.go:221 +0x16d

goroutine 119 [select]:
io.(*pipe).Read(0xc0001db450, 0xc000620000, 0x8000, 0x8000, 0x1b, 0x1b, 0xc000312600)
	/usr/lib/go-1.11/src/io/pipe.go:50 +0xea
io.(*PipeReader).Read(0xc0001bc110, 0xc000620000, 0x8000, 0x8000, 0x0, 0xf27d80, 0xc0002b6390)
	/usr/lib/go-1.11/src/io/pipe.go:127 +0x4c
main.(*webRTCConn).Read(0xc0003ff8f0, 0xc000620000, 0x8000, 0x8000, 0xf27d80, 0xc0002b6390, 0x12c0400)
	/tmp/snowflake/proxy-go/snowflake.go:77 +0x4d
main.timeoutConn.Read(0xf2b6e0, 0xc0003ff8f0, 0xdf8475800, 0xc000620000, 0x8000, 0x8000, 0xe78f60, 0x1, 0xc000620000)
	/tmp/snowflake/proxy-go/snowflake.go:198 +0x99
io.copyBuffer(0x7f65e1a4a518, 0xc0002d3e00, 0x7f65e1a4a538, 0xc0002d3e20, 0xc000620000, 0x8000, 0x8000, 0xeb7080, 0xc0000d4e00, 0x7f65e1a4a538)
	/usr/lib/go-1.11/src/io/io.go:402 +0x125
io.Copy(0x7f65e1a4a518, 0xc0002d3e00, 0x7f65e1a4a538, 0xc0002d3e20, 0xc0002d3e20, 0x3, 0x1)
	/usr/lib/go-1.11/src/io/io.go:364 +0x5a
main.CopyLoopTimeout.func1(0xf2a660, 0xc0002d3e00, 0xf2a660, 0xc0002d3e20)
	/tmp/snowflake/proxy-go/snowflake.go:216 +0xd2
created by main.CopyLoopTimeout
	/tmp/snowflake/proxy-go/snowflake.go:222 +0x245

goroutine 30 [semacquire]:
sync.runtime_Semacquire(0xc00026f108)
	/usr/lib/go-1.11/src/runtime/sema.go:56 +0x39
sync.(*WaitGroup).Wait(0xc00026f100)
	/usr/lib/go-1.11/src/sync/waitgroup.go:130 +0x64
main.CopyLoopTimeout(0xf2b6e0, 0xc0001ac000, 0xf2b680, 0xc000174120, 0xdf8475800)
	/tmp/snowflake/proxy-go/snowflake.go:223 +0x253
main.datachannelHandler(0xc0001ac000, 0xf29660, 0xc0001ac0c0)
	/tmp/snowflake/proxy-go/snowflake.go:258 +0x383
created by main.makePeerConnectionFromOffer.func2
	/tmp/snowflake/proxy-go/snowflake.go:303 +0x2ac

The second time I've run it it seems to be doing lots of WebRTC onmessage and write, which is guess is the correct operation.