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error: `dyn B` implements `Deref` with supertrait `(dyn A + 'static)` as output
  --> $DIR/migrate-lint-deny.rs:20:12
   |
LL |     take_a(b)
   |            ^
   |
   = 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 #89460 <https://github.com/rust-lang/rust/issues/89460>
note: the lint level is defined here
  --> $DIR/migrate-lint-deny.rs:1:9
   |
LL | #![deny(deref_into_dyn_supertrait)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error