1 error: invalid unicode character escape
2 --> $DIR/literals-are-validated-before-expansion.rs:6:20
4 LL | black_hole! { '\u{FFFFFF}' }
5 | ^^^^^^^^^^ invalid escape
7 = help: unicode escape must be at most 10FFFF
9 error: invalid unicode character escape
10 --> $DIR/literals-are-validated-before-expansion.rs:8:39
12 LL | black_hole! { "this is surrogate: \u{DAAA}" }
13 | ^^^^^^^^ invalid escape
15 = help: unicode escape must not be a surrogate
17 error: aborting due to 2 previous errors