c:\dbs>c:\dbs\5.1\bin\mysqld --defaults-file=c:\dbs\5.1\my.ini --standalone --console
090324 13:06:02 [Warning] option 'innodb-autoextend-increment': unsigned value 33554432 adjusted to 1000
090324 13:06:05  InnoDB: Started; log sequence number 0 46410
090324 13:06:06 [Note] Event Scheduler: Loaded 0 events
090324 13:06:06 [Note] c:\dbs\5.1\bin\mysqld: ready for connections.
Version: '5.1.34-Win X64 revno: 2772-log'  socket: ''  port: 3510  Source distribution
090324 13:08:53 - mysqld got exception 0xc0000005 ;
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=8384512
read_buffer_size=131072
max_used_connections=1
max_threads=151
threads_connected=1
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 338110 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

thd: 0x50dd2f0
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...
000000014000A861    mysqld.exe!Field_str::store()[field.cc:6484]
0000000140130AAA    mysqld.exe!fill_record()[sql_base.cc:8098]
0000000140130B3E    mysqld.exe!fill_record_n_invoke_before_triggers()[sql_base.cc:8143]
0000000140151913    mysqld.exe!mysql_insert()[sql_insert.cc:749]
0000000140164B2E    mysqld.exe!mysql_execute_command()[sql_parse.cc:3088]
000000014017C5D1    mysqld.exe!Prepared_statement::execute()[sql_prepare.cc:3568]
000000014017E5D6    mysqld.exe!Prepared_statement::execute_loop()[sql_prepare.cc:3241]
000000014017E7CE    mysqld.exe!mysql_stmt_execute()[sql_prepare.cc:2464]
0000000140168A03    mysqld.exe!dispatch_command()[sql_parse.cc:1172]
00000001401698A7    mysqld.exe!do_command()[sql_parse.cc:857]
00000001401FAC17    mysqld.exe!handle_one_connection()[sql_connect.cc:1115]
000000014026EE25    mysqld.exe!pthread_start()
00000001403B4E57    mysqld.exe!_callthreadstart()[thread.c:295]
00000001403B4F25    mysqld.exe!_threadstart()[thread.c:275]
00000000772DC3BD    kernel32.dll!BaseThreadInitThunk()
0000000077424581    ntdll.dll!RtlUserThreadStart()
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0000000049179430=INSERT INTO double_test(id) VALUES (1.23)
thd->thread_id=3
thd->killed=NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.