Sorry if that bug report is hard to read, debbugs crashed, so I tried to just re-send the temporary file.
The important bits are that after upgrade, smbd doesn't start up and says: [2018/05/21 14:57:03.582775, 0] ../source3/auth/auth_util.c:1372(make_new_session_info_guest) create_local_token failed: NT_STATUS_NO_MEMORY [2018/05/21 14:57:03.582858, 0] ../source3/smbd/server.c:1993(main) ERROR: failed to setup guest info. In the log files
