Today I noticed a crash that autorecovered, I have noticed similar crashes 2x in the past but no longer have the logs. I attached the log now. I could not find a similar issue with "os0thread.cc line 195".
2017-07-27 12:33:02 5bbfbb70 InnoDB: FTS Optimize Removing table bocp_919_swisoimpexs/#sql2-6ceb-37e08f
2017-07-27 12:33:09 6c0c6f70 InnoDB: Assertion failure in thread 1812754288 in file os0thread.cc line 195