All recent 5.6 builds, debug and release (e.g. http://jenkins.percona.com/job/percona-server-5.6-asan-param/100/BUILD_TYPE=release-asan,Host=ubuntu-xenial-64bit/consoleText):
tokudb.backup.tokudb_backup_set_last_error w1 [ fail ]
Test ended at 2017-01-29 12:31:06
Server log is:
==17852==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.
safe_process: Child process: 17852, exit: 1