From: src/test/compile-fail/E0527.rs E0527 needs a span_label, updating it from: ``` error[E0527]: pattern requires 2 elements but array has 4 --> src/test/compile-fail/E0527.rs:16:10 | 16 | &[a, b] => { //~ ERROR E0527 | ^^^^^^ ``` To: ``` error[E0527]: pattern requires 2 elements but array has 4 --> src/test/compile-fail/E0527.rs:16:10 | 16 | &[a, b] => { //~ ERROR E0527 | ^^^^^^ expected 4 elements ```