Request #88941 has been Accepted by jelly [1]: This is no longer the same package as it was. The original popcorntime is dead and a new repo has taken it's place with the exact same name and a similar goal but fundamentally different. This package should probably be deleted (the package does not work any more either - nothing loads).
It now ships malware.. [1] https://aur.archlinux.org/account/jelly/
