ignore

Just like this flag name states, ignore makes the block code ignored. As simple as that. It'll still get the Rust syntax color once rendered in the documentation. For example:

/// ```ignore
/// let x = 0;
/// ```

However, once rendered, it'll have a graphical notification about the fact that this block code isn't tested:

Figure 10.6

And when you hover over the  sign:

Figure 10.7

Now let's continue with compile_fail!