redis> multi
  OK
  redis> set hi 'hello'
  QUEUED
  redis> rpop hi
  QUEUED
  redis> set okay 'done'
  QUEUED
  redis> exec
  1. OK
  2. (error) ERR Operation against a key holding the wrong kind of value
  3. OK
  redis> get okay
  "'done'"
  redis> get hi
  "'hello'"
  redis>

Note that it keeps on processing, even though the second command fails. This also has nothing to do with persistence, as the exhibited behavior will be the same in a fully-alive system and from disk and anything else, because redis maintains a perfect total ordering of operations in its log format and sync behavior.