error: You matched a field with a wildcard pattern. Consider using `..` instead
  --> $DIR/unneeded_field_pattern.rs:14:15
   |
LL |         Foo { a: _, b: 0, .. } => {},
   |               ^^^^
   |
   = note: `-D clippy::unneeded-field-pattern` implied by `-D warnings`
   = help: Try with `Foo { b: 0, .. }`

error: All the struct fields are matched to a wildcard pattern, consider using `..`.
  --> $DIR/unneeded_field_pattern.rs:16:9
   |
LL |         Foo { a: _, b: _, c: _ } => {},
   |         ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: Try with `Foo { .. }` instead

error: aborting due to 2 previous errors