[[Rust]]
[[What is a segmentation fault]]

Undefined behaviour is prevented by compiler checks. For example we can't use an undefined variable in a function call. If that were unchecked it's behaviour is undefined:
- it could cause a segvault
- it could cause no harm
- it could become the target of a hack

A list of behaviours considered undefined:
https://doc.rust-lang.org/reference/behavior-considered-undefined.html