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Stop bailing out from compilation just because there were incoherent traits

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This commit is contained in:
Oli Scherer
2024-02-02 08:36:46 +00:00
parent 7f1d523cd0
commit 83738a9b1c
46 changed files with 473 additions and 92 deletions
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4
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
View File

@@ -1990,6 +1990,10 @@ pub(super) fn check_type_bounds<'tcx>(
impl_ty: ty::AssocItem,
impl_trait_ref: ty::TraitRef<'tcx>,
) -> Result<(), ErrorGuaranteed> {
// Avoid bogus "type annotations needed `Foo: Bar`" errors on `impl Bar for Foo` in case
// other `Foo` impls are incoherent.
tcx.ensure().coherent_trait(impl_trait_ref.def_id)?;
let param_env = tcx.param_env(impl_ty.def_id);
debug!(?param_env);

8
compiler/rustc_hir_analysis/src/check/wfcheck.rs
View File

@@ -1005,6 +1005,11 @@ fn check_associated_item(
enter_wf_checking_ctxt(tcx, span, item_id, |wfcx| {
let item = tcx.associated_item(item_id);
// Avoid bogus "type annotations needed `Foo: Bar`" errors on `impl Bar for Foo` in case
// other `Foo` impls are incoherent.
tcx.ensure()
.coherent_trait(tcx.parent(item.trait_item_def_id.unwrap_or(item_id.into())))?;
let self_ty = match item.container {
ty::TraitContainer => tcx.types.self_param,
ty::ImplContainer => tcx.type_of(item.container_id(tcx)).instantiate_identity(),
@@ -1291,6 +1296,9 @@ fn check_impl<'tcx>(
// therefore don't need to be WF (the trait's `Self: Trait` predicate
// won't hold).
let trait_ref = tcx.impl_trait_ref(item.owner_id).unwrap().instantiate_identity();
// Avoid bogus "type annotations needed `Foo: Bar`" errors on `impl Bar for Foo` in case
// other `Foo` impls are incoherent.
tcx.ensure().coherent_trait(trait_ref.def_id)?;
let trait_ref = wfcx.normalize(
ast_trait_ref.path.span,
Some(WellFormedLoc::Ty(item.hir_id().expect_owner().def_id)),