1 error[E0271]: type mismatch resolving `for<'a> <() as Array<'a>>::Element == ()`
2 --> $DIR/issue-39970.rs:19:5
5 | ---------- required by `Visit::visit`
7 LL | <() as Visit>::visit();
8 | ^^^^^^^^^^^^^^^^^^^^ expected `&()`, found `()`
10 = note: required because of the requirements on the impl of `Visit` for `()`
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0271`.