Assertion `time.valid(undo->top_undo_no)' fails upon ALTER IGNORE on partitioned table

--source include/have_partition.inc

--source include/have_innodb.inc

CREATE TABLE t (a INT) ENGINE=InnoDB PARTITION BY LIST (a) (PARTITION p0 VALUES IN (1,2), PARTITION pdef DEFAULT);

INSERT INTO t (a) VALUES (1),(6);

ALTER IGNORE TABLE t FORCE, ALGORITHM=COPY;

DROP TABLE t;

mariadbd: /data/bld/10.11-bug/storage/innobase/trx/trx0rec.cc:2035: dberr_t trx_undo_report_row_operation(que_thr_t*, dict_index_t*, const dtuple_t*, const upd_t*, ulint, const rec_t*, const rec_offs*, roll_ptr_t*): Assertion `time.valid(undo->top_undo_no)' failed.

260303 13:12:29 [ERROR] /share8t/bld/10.11-bug/sql/mariadbd got signal 6 ;

#8  0x00007f02dc445395 in __assert_fail_base (fmt=0x7f02dc5b9a90 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x55f99cce9fe0 "time.valid(undo->top_undo_no)", file=file@entry=0x55f99cce78a0 "/data/bld/10.11-bug/storage/innobase/trx/trx0rec.cc", line=line@entry=2035, function=function@entry=0x55f99cce9ae0 "dberr_t trx_undo_report_row_operation(que_thr_t*, dict_index_t*, const dtuple_t*, const upd_t*, ulint, const rec_t*, const rec_offs*, roll_ptr_t*)") at ./assert/assert.c:92

#9  0x00007f02dc453eb2 in __GI___assert_fail (assertion=0x55f99cce9fe0 "time.valid(undo->top_undo_no)", file=0x55f99cce78a0 "/data/bld/10.11-bug/storage/innobase/trx/trx0rec.cc", line=2035, function=0x55f99cce9ae0 "dberr_t trx_undo_report_row_operation(que_thr_t*, dict_index_t*, const dtuple_t*, const upd_t*, ulint, const rec_t*, const rec_offs*, roll_ptr_t*)") at ./assert/assert.c:101

#10 0x000055f99b5fc969 in trx_undo_report_row_operation (thr=0x620000013860, index=0x616000a63320, clust_entry=0x61700005f020, update=0x0, cmpl_info=0, rec=0x0, offsets=0x0, roll_ptr=0x7f02cc556c20) at /data/bld/10.11-bug/storage/innobase/trx/trx0rec.cc:2035

#11 0x000055f99b6d7189 in btr_cur_ins_lock_and_undo (flags=0, cursor=0x7f02cc557480, entry=0x61700005f020, thr=0x620000013860, mtr=0x7f02cc557870, inherit=0x7f02cc556db0) at /data/bld/10.11-bug/storage/innobase/btr/btr0cur.cc:2352

#12 0x000055f99b6d8b3f in btr_cur_optimistic_insert (flags=0, cursor=0x7f02cc557480, offsets=0x7f02cc5573b0, heap=0x7f02cc557390, entry=0x61700005f020, rec=0x7f02cc5573d0, big_rec=0x7f02cc557370, n_ext=0, thr=0x620000013860, mtr=0x7f02cc557870) at /data/bld/10.11-bug/storage/innobase/btr/btr0cur.cc:2579

#13 0x000055f99b449493 in row_ins_clust_index_entry_low (flags=0, mode=BTR_MODIFY_LEAF, index=0x616000a63320, n_uniq=0, entry=0x61700005f020, n_ext=0, thr=0x620000013860) at /data/bld/10.11-bug/storage/innobase/row/row0ins.cc:2954

#14 0x000055f99b44bdef in row_ins_clust_index_entry (index=0x616000a63320, entry=0x61700005f020, thr=0x620000013860, n_ext=0) at /data/bld/10.11-bug/storage/innobase/row/row0ins.cc:3357

#15 0x000055f99b44cac7 in row_ins_index_entry (index=0x616000a63320, entry=0x61700005f020, thr=0x620000013860) at /data/bld/10.11-bug/storage/innobase/row/row0ins.cc:3502

#16 0x000055f99b44dcec in row_ins_index_entry_step (node=0x6200000135e8, thr=0x620000013860) at /data/bld/10.11-bug/storage/innobase/row/row0ins.cc:3668

#17 0x000055f99b44e87b in row_ins (node=0x6200000135e8, thr=0x620000013860) at /data/bld/10.11-bug/storage/innobase/row/row0ins.cc:3793

#18 0x000055f99b44fb79 in row_ins_step (thr=0x620000013860) at /data/bld/10.11-bug/storage/innobase/row/row0ins.cc:3922

#19 0x000055f99b4a3b19 in row_insert_for_mysql (mysql_rec=0x625000293208 "\375\006", prebuilt=0x620000013120, ins_mode=ROW_INS_NORMAL) at /data/bld/10.11-bug/storage/innobase/row/row0mysql.cc:1301

#20 0x000055f99afd0d67 in ha_innobase::write_row (this=0x625000292a00, record=0x625000293208 "\375\006") at /data/bld/10.11-bug/storage/innobase/handler/ha_innodb.cc:7777

#21 0x000055f99a5e71a3 in handler::ha_write_row (this=0x625000292a00, buf=0x625000293208 "\375\006") at /data/bld/10.11-bug/sql/handler.cc:7808

#22 0x000055f99ad585cb in ha_partition::write_row (this=0x625000291948, buf=0x625000293208 "\375\006") at /data/bld/10.11-bug/sql/ha_partition.cc:4683

#23 0x000055f99a5e71a3 in handler::ha_write_row (this=0x625000291948, buf=0x625000293208 "\375\006") at /data/bld/10.11-bug/sql/handler.cc:7808

#24 0x000055f999fbb14e in copy_data_between_tables (thd=0x62c0001f0218, from=0x6190000be098, to=0x6190000c0398, ignore=true, order_num=0, order=0x0, copied=0x7f02cc55a020, deleted=0x7f02cc55a040, alter_info=0x7f02cc55cf20, alter_ctx=0x7f02cc55c060) at /data/bld/10.11-bug/sql/sql_table.cc:12429

#25 0x000055f999fb3e6d in mysql_alter_table (thd=0x62c0001f0218, new_db=0x62c0001f4fc8, new_name=0x62c0001f5428, create_info=0x7f02cc55d0d0, table_list=0x62d0000a0578, recreate_info=0x7f02cc55ce60, alter_info=0x7f02cc55cf20, order_num=0, order=0x0, ignore=true, if_exists=false) at /data/bld/10.11-bug/sql/sql_table.cc:11597

#26 0x000055f99a1806d4 in Sql_cmd_alter_table::execute (this=0x62d0000a0cb0, thd=0x62c0001f0218) at /data/bld/10.11-bug/sql/sql_alter.cc:688

#27 0x000055f999cafacd in mysql_execute_command (thd=0x62c0001f0218, is_called_from_prepared_stmt=false) at /data/bld/10.11-bug/sql/sql_parse.cc:6201

#28 0x000055f999cbc94c in mysql_parse (thd=0x62c0001f0218, rawbuf=0x62d0000a0438 "ALTER IGNORE TABLE t FORCE, ALGORITHM=COPY", length=42, parser_state=0x7f02cc55ea80) at /data/bld/10.11-bug/sql/sql_parse.cc:8223

#29 0x000055f999c91d6c in dispatch_command (command=COM_QUERY, thd=0x62c0001f0218, packet=0x62900028a219 "ALTER IGNORE TABLE t FORCE, ALGORITHM=COPY", packet_length=42, blocking=true) at /data/bld/10.11-bug/sql/sql_parse.cc:1924

#30 0x000055f999c8ea3f in do_command (thd=0x62c0001f0218, blocking=true) at /data/bld/10.11-bug/sql/sql_parse.cc:1434

#31 0x000055f99a1613cc in do_handle_one_connection (connect=0x6080000155b8, put_in_cache=true) at /data/bld/10.11-bug/sql/sql_connect.cc:1475

#32 0x000055f99a160f2b in handle_one_connection (arg=0x608000015538) at /data/bld/10.11-bug/sql/sql_connect.cc:1387

#33 0x000055f99ada15ee in pfs_spawn_thread (arg=0x617000007e98) at /data/bld/10.11-bug/storage/perfschema/pfs.cc:2201

#34 0x00007f02dc4a81c4 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442

#35 0x00007f02dc52885c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

commit e5fed9eaf49419fe81d3695a4323816db1df8e32 (HEAD)

Author: Thirunarayanan Balathandayuthapani

Date:   Thu Feb 26 12:07:23 2026 +0530

    MDEV-36436  Assertion "unexpected references" == 0 after ALTER IGNORE TABLE