The problem was found during RQG testing on MariaDB 10.4 30641f9df77be99d93524e39cdc2b2d783e6d3e1 2018-12-18
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compiled with debug.
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There was no replay of the assert on actual 10.2 and 10.3.
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ts_1.test
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--------------
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--source include/have_innodb.inc
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# --disable_abort_on_error
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CREATE TABLE t1 (col2 INT, col_int INTEGER) ENGINE = InnoDB ROW_FORMAT = Redundant ;
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INSERT INTO t1 (col2, col_int) VALUES ( 1 , 1);
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ALTER TABLE t1 ADD UNIQUE INDEX IF NOT EXISTS `huhu1` ( col2 );
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ALTER TABLE t1 ADD PRIMARY KEY IF NOT EXISTS ( col_int ) ;
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ALTER TABLE t1 DROP PRIMARY KEY;
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ALTER TABLE t1 ADD UNIQUE INDEX IF NOT EXISTS `huhu2` ( col_int ) ;
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ALTER TABLE t1 ADD PRIMARY KEY IF NOT EXISTS ( col2 ) ;
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ALTER TABLE t1 ADD COLUMN IF NOT EXISTS col_int_copy INTEGER ;
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ALTER TABLE t1 CHANGE COLUMN col_int col_int INTEGER;
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--enable_abort_on_error
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SHOW PROCESSLIST;
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....
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Version: '10.4.1-MariaDB-debug-log' socket: 'bld_debug/mysql-test/var/tmp/mysqld.1.sock' port: 16000 Source distribution
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mysqld: storage/innobase/include/row0upd.ic:83: upd_field_t* upd_get_nth_field(const upd_t*, ulint): Assertion `n < update->n_fields' failed.
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181219 11:55:47 [ERROR] mysqld got signal 6 ;
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...
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Query (0x7fd494014190): ALTER TABLE t1 CHANGE COLUMN col_int col_int INTEGER
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Connection ID (thread ID): 9
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Status: NOT_KILLED
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...
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Thread 1 (Thread 0x7fd4e43e0700 (LWP 25811)):
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#0 __pthread_kill (threadid=<optimized out>, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
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#1 0x0000564507e7eb94 in my_write_core (sig=6) at mysys/stacktrace.c:481
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#2 0x00005645076c4ca3 in handle_fatal_signal (sig=6) at sql/signal_handler.cc:305
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#3 <signal handler called>
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#4 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
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#5 0x00007fd4ea85bf5d in __GI_abort () at abort.c:90
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#6 0x00007fd4ea851f17 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x56450823aa7c "n < update->n_fields", file=file@entry=0x56450823aa38 "storage/innobase/include/row0upd.ic", line=line@entry=83, function=function@entry=0x5645082418c0 <_ZZL17upd_get_nth_fieldPK5upd_tmE19__PRETTY_FUNCTION__> "upd_field_t* upd_get_nth_field(const upd_t*, ulint)") at assert.c:92
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#7 0x00007fd4ea851fc2 in __GI___assert_fail (assertion=0x56450823aa7c "n < update->n_fields", file=0x56450823aa38 "storage/innobase/include/row0upd.ic", line=83, function=0x5645082418c0 <_ZZL17upd_get_nth_fieldPK5upd_tmE19__PRETTY_FUNCTION__> "upd_field_t* upd_get_nth_field(const upd_t*, ulint)") at assert.c:101
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#8 0x0000564507b35cbb in upd_get_nth_field (update=0x7fd494070090, n=0) at storage/innobase/include/row0upd.ic:83
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#9 0x0000564507b431e8 in btr_cur_trim (entry=0x7fd494063430, index=0x7fd49406a958, update=0x7fd494070090, thr=0x7fd49406ffd8) at storage/innobase/btr/btr0cur.cc:4377
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#10 0x0000564507b43def in btr_cur_optimistic_update (flags=42, cursor=0x7fd4e43db090, offsets=0x7fd4e43dafb0, heap=0x7fd4e43dafb8, update=0x7fd494070090, cmpl_info=1, thr=0x7fd49406ffd8, trx_id=100, mtr=0x7fd4e43db1a0) at storage/innobase/btr/btr0cur.cc:4547
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#11 0x0000564507b44bde in btr_cur_pessimistic_update (flags=10, cursor=0x7fd4e43db090, offsets=0x7fd4e43dafb0, offsets_heap=0x7fd4e43dafb8, entry_heap=0x7fd49406a3c0, big_rec=0x7fd4e43dafc0, update=0x7fd494070090, cmpl_info=1, thr=0x7fd49406ffd8, trx_id=100, mtr=0x7fd4e43db1a0) at storage/innobase/btr/btr0cur.cc:4832
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#12 0x000056450791f382 in innobase_instant_try (ha_alter_info=0x7fd4e43dcbb0, ctx=0x7fd494015e28, altered_table=0x7fd49406e348, table=0x7fd49405c0e8, trx=0x7fd4e4677218) at storage/innobase/handler/handler0alter.cc:5618
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#13 0x0000564507939af9 in commit_try_norebuild (ha_alter_info=0x7fd4e43dcbb0, ctx=0x7fd494015e28, altered_table=0x7fd49406e348, old_table=0x7fd49405c0e8, trx=0x7fd4e4677218, table_name=0x7fd494069b95 "t1") at storage/innobase/handler/handler0alter.cc:10047
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#14 0x000056450792cc1d in ha_innobase::commit_inplace_alter_table (this=0x7fd494092400, altered_table=0x7fd49406e348, ha_alter_info=0x7fd4e43dcbb0, commit=true) at storage/innobase/handler/handler0alter.cc:10682
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#15 0x00005645076d104b in handler::ha_commit_inplace_alter_table (this=0x7fd494092400, altered_table=0x7fd49406e348, ha_alter_info=0x7fd4e43dcbb0, commit=true) at sql/handler.cc:4492
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#16 0x0000564507492448 in mysql_inplace_alter_table (thd=0x7fd494000ce8, table_list=0x7fd4940142a8, table=0x7fd49405c0e8, altered_table=0x7fd49406e348, ha_alter_info=0x7fd4e43dcbb0, inplace_supported=HA_ALTER_INPLACE_INSTANT, target_mdl_request=0x7fd4e43dcce0, alter_ctx=0x7fd4e43dd8d0) at sql/sql_table.cc:7590
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#17 0x0000564507498286 in mysql_alter_table (thd=0x7fd494000ce8, new_db=0x7fd4940053b0, new_name=0x7fd494005780, create_info=0x7fd4e43de4c0, table_list=0x7fd4940142a8, alter_info=0x7fd4e43de400, order_num=0, order=0x0, ignore=false) at sql/sql_table.cc:9688
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#18 0x000056450752226e in Sql_cmd_alter_table::execute (this=0x7fd494014a08, thd=0x7fd494000ce8) at sql/sql_alter.cc:491
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#19 0x00005645073c08d0 in mysql_execute_command (thd=0x7fd494000ce8) at sql/sql_parse.cc:6302
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#20 0x00005645073c5a8c in mysql_parse (thd=0x7fd494000ce8, rawbuf=0x7fd494014190 "ALTER TABLE t1 CHANGE COLUMN col_int col_int INTEGER", length=52, parser_state=0x7fd4e43df5f0, is_com_multi=false, is_next_command=false) at sql/sql_parse.cc:8104
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#21 0x00005645073b29ba in dispatch_command (command=COM_QUERY, thd=0x7fd494000ce8, packet=0x7fd49400acd9 "ALTER TABLE t1 CHANGE COLUMN col_int col_int INTEGER", packet_length=52, is_com_multi=false, is_next_command=false) at sql/sql_parse.cc:1850
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#22 0x00005645073b13cf in do_command (thd=0x7fd494000ce8) at sql/sql_parse.cc:1395
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#23 0x000056450751c29e in do_handle_one_connection (connect=0x56450b04c968) at sql/sql_connect.cc:1402
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#24 0x000056450751c015 in handle_one_connection (arg=0x56450b04c968) at sql/sql_connect.cc:1308
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#25 0x0000564507e16d63 in pfs_spawn_thread (arg=0x56450b092d98) at storage/perfschema/pfs.cc:1862
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#26 0x00007fd4eb4fd7fc in start_thread (arg=0x7fd4e43e0700) at pthread_create.c:465
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#27 0x00007fd4ea937b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
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Bug
Major