[jeff-davis]

Longjmp is used by Postgres for transaction aborts. With C, there's not really a better option available.

[eqvinox]

That's not from within signal handlers, though. (i.e. it relates to this specific longjmp discussion but not the root post re. exceptions on other threads.)

[anarazel]

It unfortunately is used from within signal handlers, albeit only in specific cases (SIGFPE). There used to several more, but we luckily largely cleaned that up over the last few years.