Ferris is incorrect about code compilation in chapter 3.2

[ExtraE113]

Niceties

Thanks for writing this book. It's super helpful in learning rust!

This is a minor thing, but I figured I'd point it out. If I get the opportunity I'll open a PR with a fix.

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

The text of the book says that the code for the invalid array element access will compile (which it will) but Ferris says it won't.

[ExtraE113]

Ok, after perusing the repo for a while I don't see where Ferris is added-- he's not included in the markdown, and a (quick) look through tools doesn't reveal him either.

EDIT: See this commit: ac4faae

This should be fixed, but it isn't.

[ExtraE113]

See also #2417

[carols10cents]

The book has been fixed, but the fix hasn't ridden the Rust release trains to stable yet. You can read the new text at doc.rust-lang.org/nightly/book/ch03-02-data-types.html#invalid-array-element-access (note nightly in the URL instead of stable).

Thanks!