1 error: an inner attribute is not permitted in this context
8 | ----------- the inner attribute doesn't annotate this function
10 = note: inner attributes, like `#![no_std]`, annotate the item enclosing them, and are usually found at the beginning of source files
11 help: to annotate the function, change the attribute from inner to outer style
17 error[E0522]: definition of an unknown language item: `foo`
21 | ^^^^^^^^^^^^^^^^ definition of unknown language item `foo`
23 error: aborting due to 2 previous errors
25 For more information about this error, try `rustc --explain E0522`.