Why can there be SIGSEGV when sending a signal?

Question

Qt

I wrote a simple example in which many threads are created from another non-main thread, after a few minutes of work the application crashes.
It crashes on this line: the code is available at the links: https://github.com/juanito14/testQThread https://yadi.sk/d/DQ4Bf3p2eFXaf
emit finished();

Answer 1

Call disconnect() in destructors.