valgrind warnings in rpl.rpl_heartbeat_basic 'mix'

http://jenkins.percona.com/job/percona-server-5.5-valgrind/BUILD_TYPE=valgrind,Host=ubuntu-natty-64bit/3/console

rpl.rpl_heartbeat_basic 'mix' w8 [ fail ] Found warnings/errors in server log file!
        Test ended at 2011-06-09 04:43:07
line
==7148== Thread 18:
==7148== Conditional jump or move depends on uninitialised value(s)
==7148== at 0x9C256B: longest_match (deflate.c:1139)
==7148== by 0x9C2B38: deflate_slow (deflate.c:1595)
==7148== by 0x9C3F01: deflate (deflate.c:790)
==7148== by 0x9C1EA6: compress (compress.c:49)
==7148== by 0x7CF53C: my_compress_alloc (my_compress.c:71)
==7148== by 0x7CF5DC: my_compress (my_compress.c:50)
==7148== by 0x519430: net_real_write (net_serv.cc:605)
==7148== by 0x519782: net_flush (net_serv.cc:337)
==7148== by 0x51E4CC: net_send_eof(THD*, unsigned int, unsigned int) (protocol.cc:297)
==7148== by 0x51E78C: Protocol::end_statement() (protocol.cc:509)
==7148== by 0x58D75D: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1415)
==7148== by 0x62C931: do_handle_one_connection(THD*) (sql_connect.cc:1391)
==7148== by 0x62CA90: handle_one_connection (sql_connect.cc:1314)
==7148== by 0x7EB658: pfs_spawn_thread (pfs.cc:1015)
==7148== by 0x4E35D8B: start_thread (pthread_create.c:304)
==7148== by 0x5F0504C: clone (clone.S:112)
==7148== Conditional jump or move depends on uninitialised value(s)
==7148== at 0x9C24FD: longest_match (deflate.c:1121)
==7148== by 0x9C2B38: deflate_slow (deflate.c:1595)
==7148== by 0x9C3F01: deflate (deflate.c:790)
==7148== by 0x9C1EA6: compress (compress.c:49)
==7148== by 0x7CF53C: my_compress_alloc (my_compress.c:71)
==7148== by 0x7CF5DC: my_compress (my_compress.c:50)
==7148== by 0x519430: net_real_write (net_serv.cc:605)
==7148== by 0x519782: net_flush (net_serv.cc:337)
==7148== by 0x51E4CC: net_send_eof(THD*, unsigned int, unsigned int) (protocol.cc:297)
==7148== by 0x51E78C: Protocol::end_statement() (protocol.cc:509)
==7148== by 0x58D75D: dispatch_command(enum_server_command, THD*, char*, unsigned int) (sql_parse.cc:1415)
==7148== by 0x62C931: do_handle_one_connection(THD*) (sql_connect.cc:1391)
==7148== by 0x62CA90: handle_one_connection (sql_connect.cc:1314)
==7148== by 0x7EB658: pfs_spawn_thread (pfs.cc:1015)
==7148== by 0x4E35D8B: start_thread (pthread_create.c:304)
==7148== by 0x5F0504C: clone (clone.S:112)