alt Hacker News> That's not really a memory safety bug, due to the fact that it panics rather than doing something unsafe.
The ? operator can be nicer to read then all those .unwraps() as an alternative and doesn't panic.
I guess the concern with panics is you're not forced to think about how you want to handle them like you do when you get a `Result` or `Option` returned.
As a result it could be used as a DDOS against your app if it's network accessible.
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Applying the ? operator to an Option<_> doesn't work inside a function returning io::Result<_>, for example, and turning the None from an out-of-bounds vector access into some io::Result::Err usually wouldn't make sense.
I would go so far as to say that an out-of-bounds index is always a logic error (to be handled by panicking), not an input error (to be handled with Result). And if the out-of-bounds access was caused by invalid input, then logic error consists of not checking the input before indexing.
gotta remember tho that ? didn’t exist in 1.0, and now we can’t break existing code