CURRENT_TEST: ml_err7 InnoDB: The first specified data file ./ibdata1 did not exist: InnoDB: a new database to be created! 040624 15:43:19 InnoDB: Setting file ./ibdata1 size to 50 MB InnoDB: Database physically writes the file full: wait... 040624 15:43:22 InnoDB: Log file ./ib_logfile0 did not exist: new to be created InnoDB: Setting log file ./ib_logfile0 size to 5 MB InnoDB: Database physically writes the file full: wait... 040624 15:43:22 InnoDB: Log file ./ib_logfile1 did not exist: new to be created InnoDB: Setting log file ./ib_logfile1 size to 5 MB InnoDB: Database physically writes the file full: wait... InnoDB: Doublewrite buffer not found: creating new InnoDB: Doublewrite buffer created InnoDB: Creating foreign key constraint system tables InnoDB: Foreign key constraint system tables created 040624 15:43:24 InnoDB: Started; log sequence number 0 0 /GORDON/MySQL/mysql-4.1/dst/libexec/mysqld: ready for connections. Version: '4.1.3-beta-log' socket: '/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/tmp/master.sock' port: 9306 mysqld got signal 11; 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. 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. key_buffer_size=1048576 read_buffer_size=131072 max_used_connections=1 max_connections=100 threads_connected=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections = 39423 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd=0x8786db8 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... Cannot determine thread, fp=0x42ccdea8, backtrace may not be correct. Stack range sanity check OK, backtrace follows: 0x817f35d 0x4017296c (nil) 0x81db770 0x81db53c 0x8195b6f 0x819bb1d 0x8194d04 0x81941c5 0x81936be 0x4016cf60 0x4030d327 New value of fp=(nil) failed sanity check, terminating stack trace! Please read http://www.mysql.com/doc/en/Using_stack_trace.html and follow instructions on how to resolve the stack trace. Resolved stack trace is much more helpful in diagnosing the problem, so please do resolve it Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0x879fba8 = explain SELECT (SELECT SUM(1 + 1) FROM t2 ) as scalar_s, exists (select 1 from t2) as exists_s, (c1 - 4, c1 - 4) in (select c1 + 4 , c1 + 4 from t2) as in_row_s FROM t_many_col_types, (select c25 x, c32 y from t2) tt WHERE x = c25 thd->thread_id=1 The manual page at http://www.mysql.com/doc/en/Crashing.html contains information that should help you find out what is causing the crash. Writing a core file /bin/sh: line 1: 20610 Segmentation fault /GORDON/MySQL/mysql-4.1/dst/libexec/mysqld --no-defaults --log-bin=/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/log/master-bin --server-id=1 --basedir=/GORDON/MySQL/mysql-4.1/dst --port=9306 --local-infile --exit-info=256 --core --datadir=/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/master-data --pid-file=/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/run/master.pid --socket=/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/tmp/master.sock --log=/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/log/master.log --character-sets-dir=/GORDON/MySQL/mysql-4.1/dst/share/mysql/charsets --default-character-set=latin1 --tmpdir=/GORDON/MySQL/mysql-4.1/dst/mysql-test/var/tmp --language=/GORDON/MySQL/mysql-4.1/dst/share/mysql/english/ --innodb_data_file_path=ibdata1:50M --open-files-limit=1024 --rpl-recovery-rank=1 --init-rpl-role=master --key_buffer_size=1M --sort_buffer=256K --max_heap_table_size=1M