Auto merge of #4886 - rust-lang:must-use-pub-only, r=phansch
Lint only exported must_use_candidates As promised on #4779, here's the check for publicly visible items for `must_use_candidate` changelog: none
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221bf650f6
@ -449,6 +449,7 @@ fn check_must_use_candidate<'a, 'tcx>(
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|| mutates_static(cx, body)
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|| in_external_macro(cx.sess(), item_span)
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|| returns_unit(decl)
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|| !cx.access_levels.is_exported(item_id)
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|| is_must_use_ty(cx, return_ty(cx, item_id))
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{
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return;
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