error[E0599]: no function or associated item named `contains` found for struct `Vec<_, _>` in the current scope --> $DIR/deref-path-method.rs:3:10 | LL | Vec::contains(&vec, &0); | ^^^^^^^^ function or associated item not found in `Vec<_, _>` | note: if you're trying to build a new `Vec<_, _>` consider using one of the following associated functions: Vec::::new Vec::::with_capacity Vec::::from_raw_parts Vec::::new_in and 2 others --> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL help: the function `contains` is implemented on `[_]` | LL | <[_]>::contains(&vec, &0); | ~~~~~ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0599`.