Believe it or not, straight to jail.

Same thing that happens whenever your flight gets diverted to South Korea and you have condoms, or Indonesia and you have legal weed, or to Australia and you have a pineapple.

Which is that it depends on the mood of the person in charge. Either you get to keep it, or it's confiscated and destroyed, or you go to jail, or you go to a firing squad.

We can guess which is more likely in each country. Indonesia almost always executes people found with drugs. Australia would probably just destroy your pineapple. India, being authoritarian but not completely insane, my guess is they'd take it and fine you.

I'm aware of stories of people who've had their flights unexpectedly grounded in New York (, New York) so they just abandoned their checked pistol and refused to collect it. I'd imagine something similar. If you never take possession, it becomes harder to charge and convict someone for possession.

The poster you're answering to just described what happens.