src/test/ui/unknown-unstable-lints/warn-unknown-unstable-lint-command-line.stderr

   1 warning: unknown lint: `test_unstable_lint`
   2    |
   3    = note: the `test_unstable_lint` lint is unstable
   4    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
   5    = note: requested on the command line with `-W unknown-lints`
   6
   7 warning: unknown lint: `test_unstable_lint`
   8    |
   9    = note: the `test_unstable_lint` lint is unstable
  10    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
  11
  12 warning: unknown lint: `test_unstable_lint`
  13    |
  14    = note: the `test_unstable_lint` lint is unstable
  15    = help: add `#![feature(test_unstable_lint)]` to the crate attributes to enable
  16
  17 warning: 3 warnings emitted
  18