Same crash here, pasted below.  In this workload's case there are approximately 1k temporary InnoDB tables created per second (from Zend) so our first attempt to avoid this crash is to set @@default_storage_engine=MyISAM


130221  5:27:23  InnoDB: Assertion failure in thread 140436716721920 in file fil0fil.c line 2415
InnoDB: Failing assertion: node->n_pending == 0
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.
10:27:23 UTC - mysqld got signal 6 ;
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.
Please help us make Percona Server better by reporting any
bugs at http://bugs.percona.com/

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=153
max_threads=2000
thread_count=30
connection_count=30
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 4384707 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x5078f6a0
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...
stack_bottom = 7fb9f89d0e58 thread_stack 0x40000
/usr/sbin/mysqld(my_print_stacktrace+0x35)[0x7ac7e5]
/usr/sbin/mysqld(handle_fatal_signal+0x4a4)[0x688084]
/lib64/libpthread.so.0(+0xf500)[0x7fc5d616c500]
/lib64/libc.so.6(gsignal+0x35)[0x7fc5d53348a5]
/lib64/libc.so.6(abort+0x175)[0x7fc5d5336085]
/usr/sbin/mysqld[0x8ecdd9]
/usr/sbin/mysqld[0x8443f8]
/usr/sbin/mysqld[0x82ad39]
/usr/sbin/mysqld(_Z18rm_temporary_tableP10handlertonPc+0xf4)[0x54ed54]
/usr/sbin/mysqld(_Z15close_temporaryP5TABLEbb+0xba)[0x54ee6a]
/usr/sbin/mysqld(_Z21close_temporary_tableP3THDP5TABLEbb+0xf9)[0x5532e9]
/usr/sbin/mysqld(_Z20drop_temporary_tableP3THDP10TABLE_LISTPb+0x79)[0x5533e9]
/usr/sbin/mysqld(_Z23mysql_rm_table_no_locksP3THDP10TABLE_LISTbbbb+0x242)[0x5eb842]
/usr/sbin/mysqld(_Z14mysql_rm_tableP3THDP10TABLE_LISTcc+0x15d)[0x5ec4fd]
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x127a)[0x58aafa]
/usr/sbin/mysqld(_ZN18Prepared_statement7executeEP6Stringb+0x3b9)[0x59ba89]
/usr/sbin/mysqld(_ZN18Prepared_statement12execute_loopEP6StringbPhS2_+0x7b)[0x59f36b]
/usr/sbin/mysqld(_Z19mysqld_stmt_executeP3THDPcj+0x21e)[0x59f99e]
/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1390)[0x58f8c0]
/usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0xd7)[0x62a397]
/usr/sbin/mysqld(handle_one_connection+0x51)[0x62a4d1]
/lib64/libpthread.so.0(+0x7851)[0x7fc5d6164851]
/lib64/libc.so.6(clone+0x6d)[0x7fc5d53ea11d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7fb99c3067e8): is an invalid pointer
Connection ID (thread ID): 12281723
Status: NOT_KILLED