Mine

+ bastion=bastionhost
+ login=hostname
+ current=/backup/hostname/current
+ via='-e \"ssh $bastion ssh\" $login:'
+ eval rsync -aphvz --delete --compress '-e \"ssh $bastion ssh\" $login:/root/' /backup/hostname/current/root/
++ rsync -aphvz --delete --compress -e '"ssh' bastionhost 'ssh"' hostname:/root/ /backup/hostname/current/root/
Unexpected remote arg: hostname:/root/
rsync error: syntax or usage error (code 1) at main.c(1222) [sender=3.0.7]