Occasional program crashes on ubuntu20.04 about swift-nio

[Lukasa]

This crash is in your code:

 0                         0x00007fcf719240b3 swift::RefCounts >::incrementSlow(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 35 in libswiftCore.so
 1 [ra]                    0x00007fcf7192bfbb swift_bridgeObjectRetain + 26 in libswiftCore.so
 2 [ra] [system]           0x0000562f2368c538 getDetails #1 (vc:) in routes(_:) + 743 in tbx_4 at /root/tbx_4/x-bot/
 3 [ra] [inlined]          0x0000562f2368d60c specialized Sequence.forEach(_:) in tbx_4 at /root/tbx_4/x-bot/Sources/tbx_4/routes.swift:171:24

It is overwhelmingly likely that this is a thread-safety issue, where you are reading/modifying some state on multiple threads at the same time. That will lead to this crash on the retain call, where you are attempting to retain an object that has been deallocated. I recommend you use thread sanitizer to try to diagnose this issue. However, this is not a NIO bug.

[shenfu1991]

Because the program has crashed, the PID cannot be known and therefore the nio-diagnose.md file cannot be produced.