MariaDB 10.0.21 crashes during preparation of an UPDATE statement with a SELECT subquery in combination with ONLY_FULL_GROUP_BY.
One can reproduce the issue using docker as follows:
First start the MariaDB database container:
docker run -it --rm --name crasher -e MYSQL_ROOT_PASSWORD=root mariadb:10.0.21
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Afterwards connect with the MariaDB command line client:
docker run -ti --rm --link crasher:mariadb mariadb mysql --host=mariadb -proot
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Inside the command line client perform the following querys:
-- create test database
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CREATE DATABASE IF NOT EXISTS db; use db;
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-- drop test tables
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DROP TABLE IF EXISTS t1; DROP TABLE IF EXISTS t2;
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-- create test tables
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CREATE TABLE t1 ( id INT(10), value INT(10) ); CREATE TABLE t2 ( id INT(10) );
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-- enable full group by
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SET SESSION sql_mode = 'ONLY_FULL_GROUP_BY';
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-- try to prepare query
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PREPARE stmt FROM 'UPDATE t1 t1 SET value = (SELECT 1 FROM t2 WHERE id = t1.id)';
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The last query will return:
ERROR 2013 (HY000): Lost connection to MySQL server during query
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And the server crashes because of signal 11. The stack trace is a follows:
Thread pointer: 0x0x7fa1d3641008
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Attempting backtrace. You can use the following information to find out
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where mysqld died. If you see no messages after this, something went
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terribly wrong...
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stack_bottom = 0x7fa1f779ce70 thread_stack 0x48000
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mysqld(my_print_stacktrace+0x3d)[0x7fa1f7195a2d]
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mysqld(handle_fatal_signal+0x31a)[0x7fa1f6cd375a]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0xf8d0)[0x7fa1f633d8d0]
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mysqld(_ZN10Item_field15fix_outer_fieldEP3THDPP5FieldPP4Item+0x14c)[0x7fa1f6cf8a1c]
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mysqld(_ZN10Item_field10fix_fieldsEP3THDPP4Item+0x4f2)[0x7fa1f6cf9742]
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mysqld(_ZN9Item_func10fix_fieldsEP3THDPP4Item+0x1b3)[0x7fa1f6d2f3a3]
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mysqld(_Z11setup_condsP3THDP10TABLE_LISTR4ListIS1_EPP4Item+0x1c3)[0x7fa1f6b09573]
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mysqld(+0x42f111)[0x7fa1f6b9d111]
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mysqld(_ZN30subselect_single_select_engine7prepareEv+0x688)[0x7fa1f6d62788]
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mysqld(_ZN14Item_subselect10fix_fieldsEP3THDPP4Item+0xed)[0x7fa1f6d60aed]
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mysqld(_Z12setup_fieldsP3THDPP4ItemR4ListIS1_E17enum_mark_columnsPS5_b+0x184)[0x7fa1f6b07594]
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mysqld(+0x3f7f7a)[0x7fa1f6b65f7a]
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mysqld(_ZN18Prepared_statement7prepareEPKcj+0x6dd)[0x7fa1f6b6771d]
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mysqld(_Z22mysql_sql_stmt_prepareP3THD+0x39f)[0x7fa1f6b67caf]
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mysqld(_Z21mysql_execute_commandP3THD+0x90e)[0x7fa1f6b4edfe]
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mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x1e2)[0x7fa1f6b551d2]
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mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1787)[0x7fa1f6b56f87]
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mysqld(_Z24do_handle_one_connectionP3THD+0x28b)[0x7fa1f6c2da5b]
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mysqld(handle_one_connection+0x40)[0x7fa1f6c2dac0]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0x80a4)[0x7fa1f63360a4]
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/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fa1f493e04d]
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Trying to get some variables.
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Some pointers may be invalid and cause the dump to abort.
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Query (0x7fa1be042408): is an invalid pointer
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Connection ID (thread ID): 2
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Status: NOT_KILLED
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Bug
Major
This issue still exists in 10.1.