I just finished a game as the Executioner. I got my target lynched properly, and continued the game. My target was then brought back by the Retributionist, which the Wiki says should not undo my victory condition.
Some time after he was brought back, my target was turned into a Vampire. I survived to the end of the game, and my target was Staked at night by the Vampire Hunter.
When we went to the End Of Game screen, I got a Loss.
http://imgur.com/a/8jX0p
(I did search for this in the Advanced Search, and didn't see any reports about this)
Edit: Looking at the post-game screenshot, it apparently DID turn me into a Jester when my Target died, but it didn't ever change my Role window. I was still Exe right up to the end.