2017-07-31 12:51:38: ERROR[Server]: /home/minetest/minetest/src/server.cpp:73: virtual void* ServerThread::run(): A fatal error occured: Failed to save block: unable to open database file
2017-07-31 12:51:38: ERROR[Server]: Debug stacks:
2017-07-31 12:51:38: ERROR[Server]: DEBUG STACK FOR THREAD 7fb61666d700:
2017-07-31 12:51:38: ERROR[Server]: #0  virtual void* EmergeThread::run()
2017-07-31 12:51:38: ERROR[Server]: DEBUG STACK FOR THREAD 7fb616e6e700:
2017-07-31 12:51:38: ERROR[Server]: #0  virtual void* CurlFetchThread::run()
2017-07-31 12:51:38: ERROR[Server]: DEBUG STACK FOR THREAD 7fb61766f700:
2017-07-31 12:51:38: ERROR[Server]: #0  virtual void* ServerThread::run()
2017-07-31 12:51:38: ERROR[Server]: DEBUG STACK FOR THREAD 7fb623bc1780:
2017-07-31 12:51:38: ERROR[Server]: #0  int main(int, char**)
2017-07-31 12:51:38: ERROR[Server]: #1  Dedicated server branch
2017-07-31 12:51:38: ERROR[Server]: #2  void dedicated_server_loop(Server&, bool&)