warning: to use a constant of type `CustomEq` in a pattern, `CustomEq` must be annotated with `#[derive(PartialEq, Eq)]`
  --> $DIR/custom-eq-branch-warn.rs:33:9
   |
LL |         BAR_BAZ => panic!(),
   |         ^^^^^^^
   |
note: the lint level is defined here
  --> $DIR/custom-eq-branch-warn.rs:4:9
   |
LL | #![warn(indirect_structural_match)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>

warning: 1 warning emitted