1 error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
2 --> $DIR/huge_multispan_highlight.rs:90:13
5 | - help: consider changing this to be mutable: `mut x`
8 | ^^^^^^ cannot borrow as mutable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0596`.