error[E0412]: cannot find type `n` in this scope --> $DIR/issue-90871.rs:4:22 | LL | type_ascribe!(2, n([u8; || 1])) | ^ help: a trait with a similar name exists: `Fn` --> $SRC_DIR/core/src/ops/function.rs:LL:COL | = note: similarly named trait `Fn` defined here error[E0308]: mismatched types --> $DIR/issue-90871.rs:4:29 | LL | type_ascribe!(2, n([u8; || 1])) | ^^^^ expected `usize`, found closure | = note: expected type `usize` found closure `{closure@$DIR/issue-90871.rs:4:29: 4:31}` help: use parentheses to call this closure | LL | type_ascribe!(2, n([u8; (|| 1)()])) | + +++ error: aborting due to 2 previous errors Some errors have detailed explanations: E0308, E0412. For more information about an error, try `rustc --explain E0308`.