warning: the item `Some` is imported redundantly
  --> $DIR/use-redundant-prelude-rust-2015.rs:5:5
   |
LL | use std::option::Option::Some;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
   |
   = note: the item `Some` is already defined here
   |
note: the lint level is defined here
  --> $DIR/use-redundant-prelude-rust-2015.rs:2:9
   |
LL | #![warn(redundant_imports)]
   |         ^^^^^^^^^^^^^^^^^

warning: the item `None` is imported redundantly
  --> $DIR/use-redundant-prelude-rust-2015.rs:6:5
   |
LL | use std::option::Option::None;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
   |
   = note: the item `None` is already defined here

warning: the item `Ok` is imported redundantly
  --> $DIR/use-redundant-prelude-rust-2015.rs:8:5
   |
LL | use std::result::Result::Ok;
   |     ^^^^^^^^^^^^^^^^^^^^^^^
  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
   |
   = note: the item `Ok` is already defined here

warning: the item `Err` is imported redundantly
  --> $DIR/use-redundant-prelude-rust-2015.rs:9:5
   |
LL | use std::result::Result::Err;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
  --> $SRC_DIR/std/src/prelude/mod.rs:LL:COL
   |
   = note: the item `Err` is already defined here

warning: 4 warnings emitted