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Hello,
we are seeing occurrences of the same kind of crash while working with collection in Swift.
crash stack of the crash is as below:
0 libsystem_kernel.dylib 0x1d810e974 __pthread_kill + 8
1 libsystem_c.dylib 0x197b57b80 abort + 179
2 libswiftCore.dylib 0x18e85a690 swift::fatalErrorv(unsigned int, char const*, char*) + 135
3 libswiftCore.dylib 0x18e85a6b0 swift::fatalError(unsigned int, char const*, ...) + 31
4 libswiftCore.dylib 0x18e85f4dc swift_deallocClassInstance + 307
5 libswiftCore.dylib 0x18e85f36c _swift_release_dealloc + 55
6 libswiftCore.dylib 0x18e860488 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 135
crash message:
# Cause: Object 0x12d4e8000 of class _DictionaryStorage deallocated with non-zero retain count 3. This object's deinit, or something called from it, may have created a strong reference to self which outlived deinit, resulting in a dangling reference.