QuickFIX app crashes panic: runtime error: index out of range quickfix.ParseMessageWithDataDictionary

[hunghoang]

I have a QuickFIX App that acts as a Proxy: Convert from Fix44 to Fix42 before sending message to server and convert response from Fix42 to Fix44 before sending response to client.

When I try to send 100 msg from client, My app throws:

panic: runtime error: index out of range

goroutine 44 [running]:
vendor/github.com/quickfixgo/quickfix.ParseMessageWithDataDictionary(0xc0004dc0d0, 0xc00038efc0, 0x0, 0x0, 0xd, 0x10)
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/message.go:199 +0x20f2
vendor/github.com/quickfixgo/quickfix.inSession.resendMessages(0xc00013a400, 0x6b, 0x77, 0xc000100c60, 0xc000018880, 0x7, 0x8, 0x1439d60, 0xc000100cc0, 0xc000016998, ...)
/entrade/order-proxy/src/vendor/github.com/quickfixgo/quickfix/in_session.go:220 +0x456
vendor/github.com/quickfixgo/quickfix.inSession.handleResendRequest(0xc00013a400, 0xc000194410, 0x1, 0xc0002be012)/order-proxy/src/vendor/github.com/quickfixgo/quickfix/in_session.go:186 +0x52c
vendor/github.com/quickfixgo/quickfix.inSession.FixMsgIn(0xc00013a400, 0xc000194410, 0x3, 0xc0002be058)
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/in_session.go:33 +0x61a
vendor/github.com/quickfixgo/quickfix.(*stateMachine).fixMsgIn(0xc00013a500, 0xc00013a400, 0xc000194410)
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/session_state.go:87 +0x69
vendor/github.com/quickfixgo/quickfix.(*stateMachine).Incoming(0xc00013a500, 0xc00013a400, 0xc000101110, 0xbf1d397766949e10, 0x8196a0d1e8, 0x16b6da0)
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/session_state.go:77 +0x4d5

And with race detector, I have this warning. Does not know it's related to the problem:

WARNING: DATA RACE
Read at 0x00c0002be0d1 by goroutine 10:
vendor/github.com/quickfixgo/quickfix.TagValue.total()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/tag_value.go:56 +0x5a
vendor/github.com/quickfixgo/quickfix.FieldMap.total()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/field_map.go:273 +0x21a
vendor/github.com/quickfixgo/quickfix.(*Message).cook()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/message.go:379 +0x2d2
vendor/github.com/quickfixgo/quickfix.(*Message).build()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/message.go:367 +0x50
vendor/github.com/quickfixgo/quickfix.(*Message).String()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/message.go:358 +0x14a
main.(*ClientConnector).Send()
/order-proxy/src/app/client_connector.go:85 +0x105
main.MessageForwarder.forwardBrokerToClient.func1()
/order-proxy/src/app/message_forwarder.go:42 +0x13b

Previous write at 0x00c0002be0d0 by goroutine 72:
runtime.slicecopy()
/usr/local/go/src/runtime/slice.go:197 +0x0
bytes.(*Buffer).Write()
/usr/local/go/src/bytes/buffer.go:177 +0x116
vendor/github.com/quickfixgo/quickfix.(*parser).ReadMessage()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/parser.go:150 +0x279
vendor/github.com/quickfixgo/quickfix.readLoop()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/connection.go:22 +0xcf

Goroutine 10 (running) created at:
main.MessageForwarder.forwardBrokerToClient()
/order-proxy/src/app/message_forwarder.go:36 +0x6a
main.MessageForwarder.Forward()
/order-proxy/src/app/message_forwarder.go:18 +0x86
main.main()
/order-proxy/src/app/main.go:28 +0x1e9
Goroutine 72 (running) created at:
vendor/github.com/quickfixgo/quickfix.(*Initiator).handleConnection()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/initiator.go:181 +0xa56
vendor/github.com/quickfixgo/quickfix.(*Initiator).Start.func1()
/order-proxy/src/vendor/github.com/quickfixgo/quickfix/initiator.go:46