1 error: an inner attribute is not permitted in this context
7 = note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files. Outer attributes, like `#[test]`, annotate the item following them.
9 error[E0522]: definition of an unknown language item: `foo`
13 | ^^^^^^^^^^^^^^^^ definition of unknown language item `foo`
15 error: aborting due to 2 previous errors
17 For more information about this error, try `rustc --explain E0522`.