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Prefer lower TraitUpcasting candidates

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This commit is contained in:
Michael Goulet 2025-01-14 17:54:53 +00:00
parent 2ae9916816
commit bf545ce2fe
6 changed files with 54 additions and 6 deletions
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2
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
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@ -1090,7 +1090,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
)?
.expect("did not expect ambiguity during confirmation");
Ok(ImplSource::Builtin(BuiltinImplSource::TraitUpcasting, nested))
Ok(ImplSource::Builtin(BuiltinImplSource::TraitUpcasting(idx), nested))
}
fn confirm_builtin_unsize_candidate(