bjoernager/rust
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privacy: Do not mark items reachable farther than their nominal visibility

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This commit reverts a change made in #111425.
It was believed that this change was necessary for implementing type privacy lints, but #111801 showed that it was not necessary.
Quite opposite, the revert fixes some issues.
This commit is contained in:
Vadim Petrochenkov 2023-06-15 19:07:51 +03:00
parent 17edd1a779
commit 95a24c6ed4
6 changed files with 37 additions and 34 deletions
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18
compiler/rustc_privacy/src/lib.rs
View file

@ -894,7 +894,12 @@ impl<'tcx> DefIdVisitor<'tcx> for ReachEverythingInTheInterfaceVisitor<'_, 'tcx>
_descr: &dyn fmt::Display,
) -> ControlFlow<Self::BreakTy> {
if let Some(def_id) = def_id.as_local() {
self.ev.update_eff_vis(def_id, self.effective_vis, None, self.level);
// All effective visibilities except `reachable_through_impl_trait` are limited to
// nominal visibility. If any type or trait is leaked farther than that, it will
// produce type privacy errors on any use, so we don't consider it leaked.
let nominal_vis = (self.level != Level::ReachableThroughImplTrait)
.then(|| self.ev.tcx.local_visibility(def_id));
self.ev.update_eff_vis(def_id, self.effective_vis, nominal_vis, self.level);
}
ControlFlow::Continue(())
}
@ -1869,10 +1874,9 @@ impl SearchInterfaceForPrivateItemsVisitor<'_> {
return false;
};
// FIXME: `Level::Reachable` should be taken instead of `Level::Reexported`
let reexported_at_vis = *effective_vis.at_level(Level::Reexported);
let reachable_at_vis = *effective_vis.at_level(Level::Reachable);
if !vis.is_at_least(reexported_at_vis, self.tcx) {
if !vis.is_at_least(reachable_at_vis, self.tcx) {
let lint = if self.in_primary_interface {
lint::builtin::PRIVATE_INTERFACES
} else {
@ -1889,7 +1893,7 @@ impl SearchInterfaceForPrivateItemsVisitor<'_> {
tcx: self.tcx,
})
.into(),
item_vis_descr: &vis_to_string(self.item_def_id, reexported_at_vis, self.tcx),
item_vis_descr: &vis_to_string(self.item_def_id, reachable_at_vis, self.tcx),
ty_span: vis_span,
ty_kind: kind,
ty_descr: descr.into(),
@ -2278,7 +2282,7 @@ fn effective_visibilities(tcx: TyCtxt<'_>, (): ()) -> &EffectiveVisibilities {
changed: false,
};
visitor.effective_visibilities.check_invariants(tcx, true);
visitor.effective_visibilities.check_invariants(tcx);
if visitor.impl_trait_pass {
// Underlying types of `impl Trait`s are marked as reachable unconditionally,
// so this pass doesn't need to be a part of the fixed point iteration below.
@ -2295,7 +2299,7 @@ fn effective_visibilities(tcx: TyCtxt<'_>, (): ()) -> &EffectiveVisibilities {
break;
}
}
visitor.effective_visibilities.check_invariants(tcx, false);
visitor.effective_visibilities.check_invariants(tcx);
let mut check_visitor =
TestReachabilityVisitor { tcx, effective_visibilities: &visitor.effective_visibilities };