Ok, here we go:
I am a trapper.
N1 I build my trap.
N2 I place my trap on Diablo. I die to a werewolf. https://i.gyazo.com/5d6455440a2edbad093 ... 4af68f.png
D3 It's revealed that Diablo also died N2 (to the ww) because he visited me. https://i.gyazo.com/0c0466f949c4482e499 ... 4bead2.png
N3 I get resurrected. https://i.gyazo.com/295018814748fa2c081 ... cb743e.png
N4 I cannot start building(*) a new trap because my old one is already set... despite Diablo being dead. https://i.gyazo.com/cb6b527729597ea4058 ... c082f2.jpg / https://i.gyazo.com/3c21ae29df30618c955 ... 2aff34.png
I would think that with someone dead there cannot be a trap on them, and therefore I should not have to dismantle the non-existent trap.
*According to the wiki, dismantling and building a trap happens on the same night, so functionally I suppose there wouldn't be a difference if I were to have been given the option to build instead of dismantle, but it's still a bit odd.