error: lint group `rust_2018_idioms` has the same priority (0) as a lint
 --> Cargo.toml:7:1
  |
7 | rust_2018_idioms = "warn"
  | ^^^^^^^^^^^^^^^^   ------ has an implicit priority of 0
8 | bare_trait_objects = "allow"
  | ------------------ has the same priority as this lint
  |
  = note: the order of the lints in the table is ignored by Cargo
  = note: `#[deny(clippy::lint_groups_priority)]` on by default
help: to have lints override the group set `rust_2018_idioms` to a lower priority
  |
7 | rust_2018_idioms = { level = "warn", priority = -1 }
  |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: lint group `unused` has the same priority (0) as a lint
  --> Cargo.toml:10:1
   |
10 | unused = { level = "deny" }
   | ^^^^^^   ------------------ has an implicit priority of 0
11 | unused_braces = { level = "allow", priority = 1 }
12 | unused_attributes = { level = "allow" }
   | ----------------- has the same priority as this lint
   |
   = note: the order of the lints in the table is ignored by Cargo
help: to have lints override the group set `unused` to a lower priority
   |
10 | unused = { level = "deny", priority = -1 }
   |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: lint group `pedantic` has the same priority (-1) as a lint
  --> Cargo.toml:19:1
   |
19 | pedantic = { level = "warn", priority = -1 }
   | ^^^^^^^^
20 | similar_names = { level = "allow", priority = -1 }
   | ------------- has the same priority as this lint
   |
   = note: the order of the lints in the table is ignored by Cargo
help: to have lints override the group set `pedantic` to a lower priority
   |
19 | pedantic = { level = "warn", priority = -2 }
   |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

error: could not compile `fail` (lib) due to 3 previous errors