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error: this unit-returning function has a `#[must_use]` attribute
  --> $DIR/must_use_unit.rs:11:1
   |
LL | #[must_use]
   | ----------- help: remove the attribute
LL | pub fn must_use_default() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::must-use-unit` implied by `-D warnings`

error: this unit-returning function has a `#[must_use]` attribute
  --> $DIR/must_use_unit.rs:14:1
   |
LL | #[must_use]
   | ----------- help: remove the attribute
LL | pub fn must_use_unit() -> () {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: this unit-returning function has a `#[must_use]` attribute
  --> $DIR/must_use_unit.rs:17:1
   |
LL | #[must_use = "With note"]
   | ------------------------- help: remove the attribute
LL | pub fn must_use_with_note() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors