error: collection is never read
  --> $DIR/collection_is_never_read.rs:21:5
   |
LL |     let mut x = HashMap::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::collection-is-never-read` implied by `-D warnings`

error: collection is never read
  --> $DIR/collection_is_never_read.rs:60:5
   |
LL |     let mut x = vec![1, 2, 3]; // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:75:5
   |
LL |     let mut x = HashMap::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:80:5
   |
LL |     let mut x = HashMap::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:88:5
   |
LL |     let mut x = vec![1, 2, 3]; // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:94:5
   |
LL |     let mut x = vec![1, 2, 3]; // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:100:5
   |
LL |     let mut x = vec![1, 2, 3]; // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:107:5
   |
LL |     let mut x = vec![1, 2, 3]; // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:124:5
   |
LL |     let mut x = HashSet::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:138:5
   |
LL |     let x = vec![1, 2, 3]; // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:173:5
   |
LL |     let mut x = std::collections::BTreeMap::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:176:5
   |
LL |     let mut x = std::collections::BTreeSet::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:179:5
   |
LL |     let mut x = std::collections::BinaryHeap::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:182:5
   |
LL |     let mut x = std::collections::HashMap::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:185:5
   |
LL |     let mut x = std::collections::HashSet::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:188:5
   |
LL |     let mut x = std::collections::LinkedList::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:191:5
   |
LL |     let mut x = Some(true); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:194:5
   |
LL |     let mut x = String::from("hello"); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:197:5
   |
LL |     let mut x = Vec::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^

error: collection is never read
  --> $DIR/collection_is_never_read.rs:201:5
   |
LL |     let mut x = std::collections::VecDeque::new(); // WARNING
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 20 previous errors