pt-deadlock-logger crashes on MySQL 5.5

[Frederic Descamps]

pt-deadlock-logger returns an error when running on MySQL 5.5:

pt-deadlock-logger h=127.0.0.1,u=root
Argument "" isn't numeric in numeric comparison (<=>) at ./pt-deadlock-logger line 2145.

I've tested this on MySQL 5.5.17 Community and 5.5.18 Community

the InnoDB status output is like this :

 ------------------------
LATEST DETECTED DEADLOCK
------------------------
111212 22:52:42
*** (1) TRANSACTION:
TRANSACTION 3405, ACTIVE 161 sec starting index read
mysql tables in use 1, locked 1
LOCK WAIT 3 lock struct(s), heap size 376, 3 row lock(s), undo log entries 2
MySQL thread id 19, OS thread handle 0x7fac301e4700, query id 180 localhost root Updating
update a set movie_id=96 where id =2
*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 0 page no 307 n bits 72 index `PRIMARY` of table `test`.`a` trx id 3405 lock_mode X locks rec but not gap waiting
Record lock, heap no 3 PHYSICAL RECORD: n_fields 6; compact format; info bits 0
 0: len 4; hex 80000002; asc ;;
 1: len 6; hex 000000003404; asc 4 ;;
 2: len 7; hex 040000163b2515; asc ;% ;;
 3: len 4; hex 80000063; asc c;;
 4: len 1; hex 01; asc ;;
 5: len 8; hex 8000124a7c1acb8c; asc J| ;;

*** (2) TRANSACTION:
TRANSACTION 3404, ACTIVE 1026 sec starting index read
mysql tables in use 1, locked 1
3 lock struct(s), heap size 376, 2 row lock(s), undo log entries 1
MySQL thread id 18, OS thread handle 0x7fac30225700, query id 181 localhost root Updating
update a set movie_id=98 where id =4
*** (2) HOLDS THE LOCK(S):
RECORD LOCKS space id 0 page no 307 n bits 72 index `PRIMARY` of table `test`.`a` trx id 3404 lock_mode X locks rec but not gap
Record lock, heap no 3 PHYSICAL RECORD: n_fields 6; compact format; info bits 0
 0: len 4; hex 80000002; asc ;;
 1: len 6; hex 000000003404; asc 4 ;;
 2: len 7; hex 040000163b2515; asc ;% ;;
 3: len 4; hex 80000063; asc c;;
 4: len 1; hex 01; asc ;;
 5: len 8; hex 8000124a7c1acb8c; asc J| ;;

*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 0 page no 307 n bits 72 index `PRIMARY` of table `test`.`a` trx id 3404 lock_mode X locks rec but not gap waiting
Record lock, heap no 5 PHYSICAL RECORD: n_fields 6; compact format; info bits 0
 0: len 4; hex 80000004; asc ;;
 1: len 6; hex 000000003405; asc 4 ;;
 2: len 7; hex 0500000e7017e8; asc p ;;
 3: len 4; hex 80000062; asc b;;
 4: len 1; hex 01; asc ;;
 5: len 8; hex 8000124a7c1acbb6; asc J| ;;

*** WE ROLL BACK TRANSACTION (2)

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PT-445