error: denote infinite loops with `loop { ... }`
  --> $DIR/lint-change-warnings.rs:15:5
   |
LL |     while true {} //~ ERROR: infinite
   |     ^^^^^^^^^^ help: use `loop`
   |
note: lint level defined here
  --> $DIR/lint-change-warnings.rs:11:9
   |
LL | #![deny(warnings)]
   |         ^^^^^^^^
   = note: #[deny(while_true)] implied by #[deny(warnings)]

warning: denote infinite loops with `loop { ... }`
  --> $DIR/lint-change-warnings.rs:25:5
   |
LL |     while true {} //~ WARNING: infinite
   |     ^^^^^^^^^^ help: use `loop`
   |
   = note: #[warn(while_true)] on by default

error: denote infinite loops with `loop { ... }`
  --> $DIR/lint-change-warnings.rs:30:5
   |
LL |     while true {} //~ ERROR: infinite
   |     ^^^^^^^^^^ help: use `loop`
   |
note: lint level defined here
  --> $DIR/lint-change-warnings.rs:28:10
   |
LL | #[forbid(warnings)]
   |          ^^^^^^^^
   = note: #[forbid(while_true)] implied by #[forbid(warnings)]

error: aborting due to 2 previous errors