110222 18:09:09 [Note] C:\DBS\5.5\bin\mysqld: ready for connections.
Version: '5.5.10'  socket: ''  port: 3540  Source distribution
InnoDB: Error: trying to free a corrupt fetch buffer.
InnoDB: Apparent memory corruption: mem dump  len 500; hex 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; asc                                                                                                                       ~ zg  8    -    w0sel.c                                                 (       (               (       x                          7        n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n v a r c h a r n ;
InnoDB: Scanning backward trying to find previous allocated mem blocks
Mem block at - 124, file w0sel.c, line 3208
Mem block at - 19708, file x0trx.c, line 99
Mem block at - 127116, file mysql.c, line 677
Freed mem block at - 128156, file w0ins.c, line 92
Freed mem block at - 204620, file w0ins.c, line 92
Mem block at - 226924, file x0trx.c, line 180
Mem block at - 229292, file x0trx.c, line 168
Mem block at - 507932, file mysql.c, line 677
Mem block at - 581068, file x0trx.c, line 192
Mem block at - 666172, file t0mem.c, line 263
InnoDB: Scanning forward trying to find next allocated mem blocks
Freed mem block at + 4116, file n0dyn.c, line 50
Mem block at + 32308, file mysql.c, line 677
Mem block at + 36452, file mysql.c, line 677
Mem block at + 52756, file w0sel.c, line 3208
Mem block at + 56900, file w0sel.c, line 3208
Mem block at + 61044, file w0sel.c, line 3208
Mem block at + 65188, file w0sel.c, line 3208
Mem block at + 69332, file w0sel.c, line 3208
Mem block at + 73476, file w0sel.c, line 3208
Mem block at + 77620, file w0sel.c, line 3208
110222 18:21:39  InnoDB: Assertion failure in thread 3620 in file .\row\row0mysql.c line 798
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
InnoDB: Thread 4496 stopped in file .\os\os0sync.c line 813
110222 18:21:39 - 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=8388608
read_buffer_size=131072
max_used_connections=1
max_threads=151
thread_count=1
connection_count=1
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 338314 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0xbdf2d50
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...
InnoDB: Thread 4504 stopped in file .\ut\ut0ut.c line 83
InnoDB: Thread 4492 stopped in file .\os\os0sync.c line 474
00000001402510BC    mysqld.exe!row_prebuilt_free()[row0mysql.c:798]
00000001402087B9    mysqld.exe!ha_innobase::close()[ha_innodb.cc:3947]
00000001400CC789    mysqld.exe!closefrm()[table.cc:2093]
000000014001C9DE    mysqld.exe!tdc_remove_table()[sql_base.cc:8828]
0000000140093C77    mysqld.exe!mysql_rm_table()[sql_table.cc:1888]
000000014000D83D    mysqld.exe!mysql_execute_command()[sql_parse.cc:2975]
0000000140010707    mysqld.exe!mysql_parse()[sql_parse.cc:5514]
00000001400114BA    mysqld.exe!dispatch_command()[sql_parse.cc:1038]
00000001400122BC    mysqld.exe!do_command()[sql_parse.cc:772]
000000014003650A    mysqld.exe!do_handle_one_connection()[sql_connect.cc:748]
0000000140036794    mysqld.exe!handle_one_connection()[sql_connect.cc:686]
00000001401CB38E    mysqld.exe!pthread_start()[my_winthread.c:63]
000000014038B00F    mysqld.exe!_callthreadstartex()[threadex.c:348]
000000014038B0C3    mysqld.exe!_threadstartex()[threadex.c:326]
0000000076B1BE3D    kernel32.dll!BaseThreadInitThunk()
0000000077226611    ntdll.dll!RtlUserThreadStart()

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (000000000BE822F0): =drop table test
Connection ID (thread ID): 1
Status: 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.
InnoDB: Thread 4500 stopped in file .\os\os0sync.c line 474