Chapter 3.2 Attempting to access an out of bounds array element is caught at compile time - not at runtime

[j-medland]

With Rust 1.45.2 (d3fb005a3 2020-07-31) attempting to access an array element which is unconditionally out of bounds is caught and reported with a compilation error as oppose to causing a runtime panic as the example suggests.

I get the following output:

Compiling arrays v0.1.0 (file:///projects/arrays)
error: this operation will panic at runtime
 --> src/main.rs:5:19
  |
5 |     let element = a[index];
  |                   ^^^^^^^^ index out of bounds: the len is 5 but the index is 10
  |
  = note: `#[deny(unconditional_panic)]` on by default

error: aborting due to previous error

[steveklabnik]

This is a duplicate of #2417 though, so I'm going to close it in favor of that one.

Thank you for reporting!