On: 15 years later: remote code execution in qmail

[saagarjha]

Even better, just actually perform undefined behavior on that branch and the compiler will get rid of it.

[kevincox → saagarjha]

This is literally what __builtin_unreachable() does. But it has the added benefit of the compiler understanding the intent so it works well with diagnostics.

[saagarjha → kevincox]

But that's a builtin, rather than something that's part of the core language :)