2019-01-09 15:55:07 0 [Note] /home/alice/git/10.4/sql/mysqld (mysqld 10.4.2-MariaDB-debug-log) starting as process 18507 ...
2019-01-09 15:55:07 0 [Note] InnoDB: Using Linux native AIO
2019-01-09 15:55:07 0 [Note] InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!!
2019-01-09 15:55:07 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2019-01-09 15:55:07 0 [Note] InnoDB: Uses event mutexes
2019-01-09 15:55:07 0 [Note] InnoDB: Compressed tables use zlib 1.2.8
2019-01-09 15:55:07 0 [Note] InnoDB: Number of pools: 1
2019-01-09 15:55:07 0 [Note] InnoDB: Using SSE2 crc32 instructions
2019-01-09 15:55:07 0 [Note] mysqld: O_TMPFILE is not supported on /home/alice/aliska/109/current1_1/tmp (disabling future attempts)
2019-01-09 15:55:07 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2019-01-09 15:55:07 0 [Note] InnoDB: Completed initialization of buffer pool
2019-01-09 15:55:07 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
2019-01-09 15:55:07 0 [Note] InnoDB: 128 out of 128 rollback segments are active.
2019-01-09 15:55:07 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2019-01-09 15:55:07 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2019-01-09 15:55:07 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2019-01-09 15:55:07 0 [Note] InnoDB: Waiting for purge to start
2019-01-09 15:55:07 0 [Note] InnoDB: 10.4.2 started; log sequence number 168363; transaction id 55
2019-01-09 15:55:07 0 [Note] InnoDB: Loading buffer pool(s) from /home/alice/aliska/109/current1_1/data/ib_buffer_pool
2019-01-09 15:55:07 0 [Note] Plugin 'FEEDBACK' is disabled.
2019-01-09 15:55:07 0 [Note] InnoDB: Buffer pool(s) load completed at 190109 15:55:07
2019-01-09 15:55:07 0 [Note] Server socket created on IP: '::'.
2019-01-09 15:55:07 0 [Note] Reading of all Master_info entries succeded
2019-01-09 15:55:07 0 [Note] Added new Master_info '' to hash table
2019-01-09 15:55:07 0 [Note] /home/alice/git/10.4/sql/mysqld: ready for connections.
Version: '10.4.2-MariaDB-debug-log'  socket: '/home/alice/aliska/109/current1_1/mysql.sock'  port: 13000  Source distribution
2019-01-09 15:56:24 16 [Note] InnoDB: Sync to disk of `test`.`non_existing_table` started.
2019-01-09 15:56:24 16 [Note] InnoDB: Stopping purge
2019-01-09 15:56:24 16 [Note] InnoDB: Writing table metadata to './test/non_existing_table.cfg'
2019-01-09 15:56:24 16 [Note] InnoDB: Table `test`.`non_existing_table` flushed to disk
2019-01-09 15:56:24 16 [Note] InnoDB: Deleting the meta-data file './test/non_existing_table.cfg'
2019-01-09 15:56:24 16 [Note] InnoDB: Resuming purge
2019-01-09 15:56:32 15 [Note] InnoDB: Sync to disk of `test`.`non_existing_table` started.
2019-01-09 15:56:32 15 [Note] InnoDB: Stopping purge
2019-01-09 15:56:32 15 [Note] InnoDB: Writing table metadata to './test/non_existing_table.cfg'
2019-01-09 15:56:32 15 [Note] InnoDB: Table `test`.`non_existing_table` flushed to disk
2019-01-09 15:56:33 15 [Note] InnoDB: Deleting the meta-data file './test/non_existing_table.cfg'
2019-01-09 15:56:33 15 [Note] InnoDB: Resuming purge
2019-01-09 15:58:17 0x7f2cd1367700  InnoDB: Assertion failure in file /home/alice/git/10.4/storage/innobase/os/os0thread.cc line 134
InnoDB: Failing assertion: ret == 0
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to https://jira.mariadb.org/
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: https://mariadb.com/kb/en/library/innodb-recovery-modes/
InnoDB: about forcing recovery.
190109 15:58:17 [ERROR] mysqld got signal 6 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed, 
something is definitely wrong and this may fail.

Server version: 10.4.2-MariaDB-debug-log
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=4
max_threads=153
thread_count=10
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467560 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f2c70000b00
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 = 0x7f2cd1366d40 thread_stack 0x49000
/home/alice/git/10.4/sql/mysqld(my_print_stacktrace+0x40)[0x564b54684bb9]
/home/alice/git/10.4/sql/mysqld(handle_fatal_signal+0x3e1)[0x564b53ebed16]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f2cea556390]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f2ce990f428]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f2ce991102a]
/home/alice/git/10.4/sql/mysqld(+0xfc4195)[0x564b54448195]
/home/alice/git/10.4/sql/mysqld(+0xe73e42)[0x564b542f7e42]
/home/alice/git/10.4/sql/mysqld(+0xec0d41)[0x564b54344d41]
/home/alice/git/10.4/sql/mysqld(+0xeed608)[0x564b54371608]
/home/alice/git/10.4/sql/mysqld(+0xef6459)[0x564b5437a459]
/home/alice/git/10.4/sql/mysqld(+0xddbd0d)[0x564b5425fd0d]
/home/alice/git/10.4/sql/mysqld(+0x810143)[0x564b53c94143]
/home/alice/git/10.4/sql/mysqld(+0x80574c)[0x564b53c8974c]
/home/alice/git/10.4/sql/mysqld(_Z17mysql_alter_tableP3THDPK25st_mysql_const_lex_stringS3_P14HA_CREATE_INFOP10TABLE_LISTP10Alter_infojP8st_orderb+0x1c29)[0x564b53c8f7d2]
/home/alice/git/10.4/sql/mysqld(_ZN19Sql_cmd_alter_table7executeEP3THD+0x6f8)[0x564b53d19e52]
/home/alice/git/10.4/sql/mysqld(_Z21mysql_execute_commandP3THD+0xa307)[0x564b53bb7424]
/home/alice/git/10.4/sql/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x2b2)[0x564b53bbc62a]
/home/alice/git/10.4/sql/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0xfe1)[0x564b53ba9514]
/home/alice/git/10.4/sql/mysqld(_Z10do_commandP3THD+0x69b)[0x564b53ba7f31]
/home/alice/git/10.4/sql/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x1ca)[0x564b53d13e92]
/home/alice/git/10.4/sql/mysqld(handle_one_connection+0x30)[0x564b53d13be3]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f2cea54c6ba]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f2ce99e141d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f2c70013b88): ALTER TABLE t3 ADD FULLTEXT KEY(scol2)  /* QNO 8270 CON_ID 16 */
Connection ID (thread ID): 16
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
Writing a core file at /home/alice/aliska/109/current1_1/data/
Aborted (core dumped)
