"1032 Can't find record in" error from Aria engine

When executing the RQG varchar scenario, Aria reported the following error to the client:

1032 Can't find record in 'table10_maria_key_pk_parts_2_varchar_255_not_null'

RQG command line:

 perl runall.pl --grammar=conf/engines/varchar.yy --gendata=conf/engines/varchar.zz --threads=1 --queries=10K --basedir=/home/philips/bzr/maria-5.1 --engine=Maria --debug --seed=time --engine=Maria --reporter=Recovery --duration=60

rqg version-info:

revision-id: philips@eve-20100828134454-yto6rs4aclivs99d
date: 2010-08-28 16:44:54 +0300
build-date: 2010-08-28 17:59:39 +0300
revno: 503
branch-nick: randgen-ruledebug

maria version-info:

revision-id: <email address hidden>
date: 2010-08-25 01:43:26 +0300
build-date: 2010-08-28 17:59:55 +0300
revno: 2917
branch-nick: maria-5.1

It would be nice for such errors to be assertions in a debug build