Crash after startDecodingSpeech

[mgmtcam22]

Hello! I have faced with new problem of using TLSphinx.
in the example of the use code it is written:
//At some point in the future stop listen to the mic decoder.stopDecodingSpeech()

but if I write only decoder.startDecodingSpeech without decoder.stopDecodingSpeech() Xcode crash after a few seconds with new message

Fatal error: Attempted to read an unowned reference but object 0x101f71650 was already deallocated2019-03-20 15:52:40.475861+0200 VoiceAssistant[34847:8497721] Fatal error: Attempted to read an unowned reference but object 0x101f71650 was already deallocated

where 0x101f71650 obj is Decoder object

Help please fix this situation