Why does Qt emit result in "program terminated unexpectedly"?

Question

Qt

The function is processing incoming messages. For each message, a signal must be generated via emit. If there are 10 messages, then there should be 10 signals. However, after the first emit-a, the program ends. By commenting emit the program works. If I take out emit for a cycle of processing - works.
What could be the problem?

Answer 1

I apologize! Everything generated great. The error was being processed!