A probability of segmentation fault

[kazachkovaanna]

https://github.com/khizmax/libcds/blob/44c052bdb69aaf26d7010074547356c80e55421a/cds/intrusive/skip_list_nogc.h#L55-L61

Afrter m_arrNext = nullptr and before m_nHeight = 1 call of method next(uint nLevel) will cause segmentation fault. This to lines should be in reverse order

[kazachkovaanna]

@eugenyk please be aware we raised this issue

[eugenyk]

@kazachkovaanna, in case of pull request with bugfix and stress or unit test, which show the bug, your brigade will be awarded an excellent mark on exam

[eugenyk]

And a piece of advice: issue title should be more special, in your case now all segmentation faults in whole library can be addressed to your issue by name