error: duplicated attribute
  --> tests/ui/duplicated_attributes.rs:2:40
   |
LL | #![warn(clippy::duplicated_attributes, clippy::duplicated_attributes)]
   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
note: first defined here
  --> tests/ui/duplicated_attributes.rs:2:9
   |
LL | #![warn(clippy::duplicated_attributes, clippy::duplicated_attributes)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: remove this attribute
  --> tests/ui/duplicated_attributes.rs:2:40
   |
LL | #![warn(clippy::duplicated_attributes, clippy::duplicated_attributes)]
   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: `-D clippy::duplicated-attributes` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::duplicated_attributes)]`

error: duplicated attribute
  --> tests/ui/duplicated_attributes.rs:6:10
   |
LL | #![allow(dead_code)]
   |          ^^^^^^^^^
   |
note: first defined here
  --> tests/ui/duplicated_attributes.rs:5:10
   |
LL | #![allow(dead_code)]
   |          ^^^^^^^^^
help: remove this attribute
  --> tests/ui/duplicated_attributes.rs:6:10
   |
LL | #![allow(dead_code)]
   |          ^^^^^^^^^

error: duplicated attribute
  --> tests/ui/duplicated_attributes.rs:14:9
   |
LL | #[allow(dead_code)]
   |         ^^^^^^^^^
   |
note: first defined here
  --> tests/ui/duplicated_attributes.rs:13:9
   |
LL | #[allow(dead_code)]
   |         ^^^^^^^^^
help: remove this attribute
  --> tests/ui/duplicated_attributes.rs:14:9
   |
LL | #[allow(dead_code)]
   |         ^^^^^^^^^

error: aborting due to 3 previous errors