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Rollup merge of #94315 - lcnr:auto-trait-lint-update, r=oli-obk

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update auto trait lint for `PhantomData`

cc https://github.com/rust-lang/rust/issues/93367#issuecomment-1047898410
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Dylan DPC 2022-02-24 21:42:17 +01:00 • committed by GitHub
commit 9e7131a0d3
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3 changed files with 33 additions and 7 deletions
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compiler/rustc_typeck/src/coherence/orphan.rs
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@ -439,6 +439,7 @@ fn fast_reject_auto_impl<'tcx>(tcx: TyCtxt<'tcx>, trait_def_id: DefId, self_ty:
}
match t.kind() {
ty::Adt(def, substs) if def.is_phantom_data() => substs.super_visit_with(self),
ty::Adt(def, substs) => {
// @lcnr: This is the only place where cycles can happen. We avoid this
// by only visiting each `DefId` once.