Thread pointer: 0x7f18c4137828

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

stack_bottom = 0x7f19484b9da8 thread_stack 0x30000

/usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x5633385f306e]

/usr/sbin/mysqld(handle_fatal_signal+0x515)[0x56333808f6d5]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7f1ca621a890]

/usr/sbin/mysqld(+0xcea231)[0x563338630231]

/usr/sbin/mysqld(_Z17find_schema_tableP3THDPK25st_mysql_const_lex_stringPb+0x55)[0x563337f20c95]

/usr/sbin/mysqld(_Z11open_tablesP3THDRK14DDL_options_stPP10TABLE_LISTPjPP19Sroutine_hash_entryjP19Prelocking_strategy+0xbb3)[0x563337e5ad03]

/usr/sbin/mysqld(_Z30open_normal_and_derived_tablesP3THDP10TABLE_LISTjj+0x5a)[0x563337e5baea]

/usr/sbin/mysqld(_Z18mysqld_list_fieldsP3THDP10TABLE_LISTPKc+0x38)[0x563337f10f98]

/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x252f)[0x563337ebd6af]

/usr/sbin/mysqld(_Z10do_commandP3THD+0x178)[0x563337ebdbf8]

/usr/sbin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x212)[0x563337f8e532]

/usr/sbin/mysqld(handle_one_connection+0x3d)[0x563337f8e70d]

/usr/sbin/mysqld(+0xc5a79a)[0x5633385a079a]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db)[0x7f1ca620f6db]

/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f1ca581188f]