error: lifetime parameters must be declared prior to type parameters
  --> $DIR/issue-59508-1.rs:12:25
   |
LL |     pub fn do_things<T, 'a, 'b: 'a>() {
   |                     ----^^--^^----- help: reorder the parameters: lifetimes, then types, then consts: `<'a, 'b: 'a, T>`

warning: the feature `const_generics` is incomplete and may cause the compiler to crash
  --> $DIR/issue-59508-1.rs:2:12
   |
LL | #![feature(const_generics)]
   |            ^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default

error: aborting due to previous error