Adbhutasagara 48.119

48.119

nirvāṇāduradīpagandhasyāghrāṇe saptāhāt---iti|
atha jihvāriṣṭaṃ viṣṇudharmottarajyotiḥ parāśarayoḥ|
ṣaṇṇāṃ rasānāṃ paryāsamiṣṭāniṣṭaviparyayaḥ|
abhakṣyalaulyamatyarthaṃ maraṇāyopajāyate||

"In seven days upon not smelling the scent of an extinguished lamp." Thus.
Now, the signs of death regarding taste, in the Viṣṇudharmottara and the Jyotiḥparāśara:
An inversion of the six tastes, a perversion of what is liked and disliked,
and excessive craving for inedible food leads to death.