error in ch03-02-data-types.html

[jonas-frey]

The text says

The compilation didn’t produce any errors, but the program resulted in a runtime error and didn’t exit successfully.

close to the end, but actually it's a compile time error as is apparent from the error message displayed above, and also verified by compiling by hand.

[nicolas17]

Hah, I just noticed this and came to report it...

https://doc.rust-lang.org/book/ch03-02-data-types.html#invalid-array-element-access

I suspect the unconditional_panic compiler check was added in a later version after that paragraph was written, and command output in the book is automatically updated?

[rgrunbla]

Yes, looking at the web archive, for the records, this was the output before:

$ cargo run
   Compiling arrays v0.1.0 (file:///projects/arrays)
    Finished dev [unoptimized + debuginfo] target(s) in 0.31 secs
     Running `target/debug/arrays`
thread '<main>' panicked at 'index out of bounds: the len is 5 but the index is
 10', src/main.rs:6
note: Run with `RUST_BACKTRACE=1` for a backtrace.

[steveklabnik]

This is a duplicate of #2417; thanks!