1 error[E0004]: non-exhaustive patterns: `&[]` not covered
4 LL | match sl { //~ ERROR non-exhaustive patterns
5 | ^^ pattern `&[]` not covered
7 = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0004`.