SET GLOBAL innodb_default_row_format=0;

CREATE TABLE t (pk INT,c CHAR(255),c2 CHAR(255),c3 CHAR(255),c4 CHAR(255),c5 CHAR(255),c6 CHAR(255),c7 CHAR(255),c8 CHAR(255),KEY(pk)) CHARACTER SET utf32 ENGINE=InnoDB;

CREATE TEMPORARY TABLE t (c CHAR(100)) ENGINE=InnoDB;

DROP TABLE t;

INSERT INTO t (c) VALUES (1);

ALTER TABLE t ENGINE=InnoDB;

mariadbd: /test/10.11_dbg/storage/innobase/row/row0merge.cc:763: ulint row_merge_buf_add(row_merge_buf_t*, dict_index_t*, const dict_table_t*, const dict_table_t*, fts_psort_t*, dtuple_t*, const row_ext_t*, bool, doc_id_t*, mem_heap_t*, dberr_t*, mem_heap_t**, TABLE*, trx_t*, const col_collations*): Assertion `index->table->not_redundant()' failed.

Core was generated by `/test/MD040423-mariadb-10.11.3-linux-x86_64-dbg/bin/mariadbd --no-defaults --co'.

Program terminated with signal SIGABRT, Aborted.

#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

[Current thread is 1 (Thread 0x152164050700 (LWP 3934791))]

(gdb) bt

#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

#1  0x000015217b9f8859 in __GI_abort () at abort.c:79

#2  0x000015217b9f8729 in __assert_fail_base (fmt=0x15217bb8e588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x55a963379a7f "index->table->not_redundant()", file=0x55a96338b170 "/test/10.11_dbg/storage/innobase/row/row0merge.cc", line=763, function=<optimized out>) at assert.c:92

#3  0x000015217ba09fd6 in __GI___assert_fail (assertion=assertion@entry=0x55a963379a7f "index->table->not_redundant()", file=file@entry=0x55a96338b170 "/test/10.11_dbg/storage/innobase/row/row0merge.cc", line=line@entry=763, function=function@entry=0x55a96338bf98 "ulint row_merge_buf_add(row_merge_buf_t*, dict_index_t*, const dict_table_t*, const dict_table_t*, fts_psort_t*, dtuple_t*, const row_ext_t*, bool, doc_id_t*, mem_heap_t*, dberr_t*, mem_heap_t**, TABL"...) at assert.c:101

#4  0x000055a962cc55f5 in row_merge_buf_add (buf=buf@entry=0x15212008bfb0, fts_index=fts_index@entry=0x0, old_table=old_table@entry=0x1521200254b0, new_table=<optimized out>, psort_info=psort_info@entry=0x0, row=row@entry=0x152120246ec8, ext=<optimized out>, history_fts=<optimized out>, doc_id=<optimized out>, conv_heap=<optimized out>, err=<optimized out>, v_heap=<optimized out>, my_table=<optimized out>, trx=<optimized out>, col_collate=<optimized out>) at /test/10.11_dbg/storage/innobase/include/dict0mem.h:1879

#5  0x000055a962cccb3b in row_merge_read_clustered_index (col_collate=0x0, allow_not_null=<optimized out>, eval_table=0x15216404beb0, crypt_block=0x0, pct_cost=<optimized out>, stage=0x152120027d80, tmpfd=0x15216404ace4, skip_pk_sort=<optimized out>, block=<optimized out>, sequence=@0x152120015768: {m_max_value = 0, m_increment = 0, m_offset = 0, m_next_value = 0, m_eof = true}, add_autoinc=18446744073709551615, col_map=0x15212008a500, add_v=0x0, defaults=0x0, n_index=2, key_numbers=0x15212008a3d8, files=0x15212008bef0, psort_info=0x0, fts_sort_idx=0x0, index=<optimized out>, online=true, new_table=<optimized out>, old_table=0x1521200254b0, table=0x15216404beb0, trx=0x152179b4ab80) at /test/10.11_dbg/storage/innobase/row/row0merge.cc:2560

#6  row_merge_build_indexes (trx=0x152179b4ab80, old_table=0x1521200254b0, new_table=0x15212002c070, online=true, indexes=0x15212008a3c8, key_numbers=0x15212008a3d8, n_indexes=2, table=0x15216404beb0, defaults=0x0, col_map=0x15212008a500, add_autoinc=18446744073709551615, sequence=@0x152120015768: {m_max_value = 0, m_increment = 0, m_offset = 0, m_next_value = 0, m_eof = true}, skip_pk_sort=true, stage=0x152120027d80, add_v=0x0, eval_table=0x15216404beb0, allow_not_null=false, col_collate=0x0) at /test/10.11_dbg/storage/innobase/row/row0merge.cc:4794

#7  0x000055a962b8f8ff in ha_innobase::inplace_alter_table (this=0x15212002dc80, altered_table=0x15216404beb0, ha_alter_info=0x15216404bdf0) at /usr/include/c++/9/bits/stl_tree.h:1043

#8  0x000055a9626434cb in handler::ha_inplace_alter_table (ha_alter_info=0x15216404bdf0, altered_table=0x15216404beb0, this=<optimized out>) at /test/10.11_dbg/sql/handler.h:4589

#9  mysql_inplace_alter_table (thd=thd@entry=0x152120000d48, table_list=0x152120013230, table=table@entry=0x15212002bbe8, altered_table=altered_table@entry=0x15216404beb0, ha_alter_info=ha_alter_info@entry=0x15216404bdf0, target_mdl_request=target_mdl_request@entry=0x15216404c690, ddl_log_state=0x15216404bd80, trigger_param=0x15216404c270, alter_ctx=0x15216404d570, partial_alter=@0x15216404bcef: false, start_alter_id=@0x15216404bcf8: 0, if_exists=false) at /test/10.11_dbg/sql/sql_table.cc:7743

#10 0x000055a9626569bc in mysql_alter_table (thd=thd@entry=0x152120000d48, new_db=new_db@entry=0x152120005858, new_name=new_name@entry=0x152120005ca0, create_info=create_info@entry=0x15216404e390, table_list=<optimized out>, table_list@entry=0x152120013230, recreate_info=recreate_info@entry=0x15216404e280, alter_info=<optimized out>, order_num=<optimized out>, order=<optimized out>, ignore=<optimized out>, if_exists=<optimized out>) at /test/10.11_dbg/sql/sql_table.cc:10845

#11 0x000055a9626d8d54 in Sql_cmd_alter_table::execute (this=<optimized out>, thd=0x152120000d48) at /test/10.11_dbg/sql/structs.h:569

#12 0x000055a96257d872 in mysql_execute_command (thd=thd@entry=0x152120000d48, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/10.11_dbg/sql/sql_parse.cc:6003

#13 0x000055a962566235 in mysql_parse (thd=thd@entry=0x152120000d48, rawbuf=<optimized out>, length=<optimized out>, parser_state=parser_state@entry=0x15216404f300) at /test/10.11_dbg/sql/sql_parse.cc:8002

#14 0x000055a96257387d in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x152120000d48, packet=packet@entry=0x15212000ae19 "ALTER TABLE t ENGINE=InnoDB", packet_length=packet_length@entry=27, blocking=blocking@entry=true) at /test/10.11_dbg/sql/sql_class.h:1369

#15 0x000055a962575cb6 in do_command (thd=0x152120000d48, blocking=blocking@entry=true) at /test/10.11_dbg/sql/sql_parse.cc:1407

#16 0x000055a9626d1ce7 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x55a9662f68e8, put_in_cache=put_in_cache@entry=true) at /test/10.11_dbg/sql/sql_connect.cc:1416

#17 0x000055a9626d21b6 in handle_one_connection (arg=0x55a9662f68e8) at /test/10.11_dbg/sql/sql_connect.cc:1318

#18 0x000015217bf09609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#19 0x000015217baf5133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95