Reproducible on maria-5.5 with XtraDB.
Could not reproduce on maria-5.3, percona-server, mysql-5.5, and on maria-5.5 with InnoDB plugin, but possibly only because in all these cases a different plan is chosen (5.5 with XtraDB says 'Using index condition', others don't).
Reproducible on maria-5.5 with XtraDB.
Could not reproduce on maria-5.3, percona-server, mysql-5.5, and on maria-5.5 with InnoDB plugin, but possibly only because in all these cases a different plan is chosen (5.5 with XtraDB says 'Using index condition', others don't).
Comments in http:// bugs.mysql. com/bug. php?id= 58015 say that the assertion is bogus, so it's just a debug nuisance.