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[missing_fields_in_debug]: don't ICE when self type is a generic param #10897

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Merged
merged 1 commit into from
Jun 7, 2023
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[missing_fields_in_debug]: don't ICE when self type is a generic param #10897

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5 changes: 5 additions & 0 deletions clippy_lints/src/missing_fields_in_debug.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -207,6 +207,11 @@ impl<'tcx> LateLintPass<'tcx> for MissingFieldsInDebug {
if let ItemKind::Impl(Impl { of_trait: Some(trait_ref), self_ty, items, .. }) = item.kind
&& let Res::Def(DefKind::Trait, trait_def_id) = trait_ref.path.res
&& let TyKind::Path(QPath::Resolved(_, self_path)) = &self_ty.kind
// don't trigger if self is a generic parameter, e.g. `impl<T> Debug for T`
// this can only happen in core itself, where the trait is defined,
// but it caused ICEs in the past:
// https://github.com/rust-lang/rust-clippy/issues/10887
&& !matches!(self_path.res, Res::Def(DefKind::TyParam, _))
&& cx.match_def_path(trait_def_id, &[sym::core, sym::fmt, sym::Debug])
// don't trigger if this impl was derived
&& !cx.tcx.has_attr(item.owner_id, sym::automatically_derived)
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