error: consider choosing a more descriptive name
  --> tests/ui/non_expressive_names.rs:28:9
   |
LL |     let _1 = 1;
   |         ^^
   |
   = note: `-D clippy::just-underscores-and-digits` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::just_underscores_and_digits)]`

error: consider choosing a more descriptive name
  --> tests/ui/non_expressive_names.rs:29:9
   |
LL |     let ____1 = 1;
   |         ^^^^^

error: consider choosing a more descriptive name
  --> tests/ui/non_expressive_names.rs:30:9
   |
LL |     let __1___2 = 12;
   |         ^^^^^^^

error: consider choosing a more descriptive name
  --> tests/ui/non_expressive_names.rs:51:13
   |
LL |         let _1 = 1;
   |             ^^

error: consider choosing a more descriptive name
  --> tests/ui/non_expressive_names.rs:52:13
   |
LL |         let ____1 = 1;
   |             ^^^^^

error: consider choosing a more descriptive name
  --> tests/ui/non_expressive_names.rs:53:13
   |
LL |         let __1___2 = 12;
   |             ^^^^^^^

error: aborting due to 6 previous errors