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Rename tcx to cx

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This commit is contained in:
Michael Goulet
2024-06-21 12:39:55 -04:00
parent c290e9de32
commit 275d922dab
13 changed files with 333 additions and 347 deletions
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85
compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs
View File

@@ -36,11 +36,11 @@ where
{
fn self_ty(self) -> I::Ty;
fn trait_ref(self, tcx: I) -> ty::TraitRef<I>;
fn trait_ref(self, cx: I) -> ty::TraitRef<I>;
fn with_self_ty(self, tcx: I, self_ty: I::Ty) -> Self;
fn with_self_ty(self, cx: I, self_ty: I::Ty) -> Self;
fn trait_def_id(self, tcx: I) -> I::DefId;
fn trait_def_id(self, cx: I) -> I::DefId;
/// Try equating an assumption predicate against a goal's predicate. If it
/// holds, then execute the `then` callback, which should do any additional
@@ -82,7 +82,7 @@ where
assumption: I::Clause,
) -> Result<Candidate<I>, NoSolution> {
Self::probe_and_match_goal_against_assumption(ecx, source, goal, assumption, |ecx| {
let tcx = ecx.cx();
let cx = ecx.cx();
let ty::Dynamic(bounds, _, _) = goal.predicate.self_ty().kind() else {
panic!("expected object type in `probe_and_consider_object_bound_candidate`");
};
@@ -91,7 +91,7 @@ where
structural_traits::predicates_for_object_candidate(
ecx,
goal.param_env,
goal.predicate.trait_ref(tcx),
goal.predicate.trait_ref(cx),
bounds,
),
);
@@ -340,15 +340,15 @@ where
goal: Goal<I, G>,
candidates: &mut Vec<Candidate<I>>,
) {
let tcx = self.cx();
tcx.for_each_relevant_impl(
goal.predicate.trait_def_id(tcx),
let cx = self.cx();
cx.for_each_relevant_impl(
goal.predicate.trait_def_id(cx),
goal.predicate.self_ty(),
|impl_def_id| {
// For every `default impl`, there's always a non-default `impl`
// that will *also* apply. There's no reason to register a candidate
// for this impl, since it is *not* proof that the trait goal holds.
if tcx.impl_is_default(impl_def_id) {
if cx.impl_is_default(impl_def_id) {
return;
}
@@ -366,8 +366,8 @@ where
goal: Goal<I, G>,
candidates: &mut Vec<Candidate<I>>,
) {
let tcx = self.cx();
let trait_def_id = goal.predicate.trait_def_id(tcx);
let cx = self.cx();
let trait_def_id = goal.predicate.trait_def_id(cx);
// N.B. When assembling built-in candidates for lang items that are also
// `auto` traits, then the auto trait candidate that is assembled in
@@ -378,47 +378,47 @@ where
// `solve::trait_goals` instead.
let result = if let Err(guar) = goal.predicate.error_reported() {
G::consider_error_guaranteed_candidate(self, guar)
} else if tcx.trait_is_auto(trait_def_id) {
} else if cx.trait_is_auto(trait_def_id) {
G::consider_auto_trait_candidate(self, goal)
} else if tcx.trait_is_alias(trait_def_id) {
} else if cx.trait_is_alias(trait_def_id) {
G::consider_trait_alias_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Sized) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Sized) {
G::consider_builtin_sized_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Copy)
|| tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Clone)
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Copy)
|| cx.is_lang_item(trait_def_id, TraitSolverLangItem::Clone)
{
G::consider_builtin_copy_clone_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::PointerLike) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::PointerLike) {
G::consider_builtin_pointer_like_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::FnPtrTrait) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::FnPtrTrait) {
G::consider_builtin_fn_ptr_trait_candidate(self, goal)
} else if let Some(kind) = self.cx().fn_trait_kind_from_def_id(trait_def_id) {
G::consider_builtin_fn_trait_candidates(self, goal, kind)
} else if let Some(kind) = self.cx().async_fn_trait_kind_from_def_id(trait_def_id) {
G::consider_builtin_async_fn_trait_candidates(self, goal, kind)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::AsyncFnKindHelper) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::AsyncFnKindHelper) {
G::consider_builtin_async_fn_kind_helper_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Tuple) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Tuple) {
G::consider_builtin_tuple_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::PointeeTrait) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::PointeeTrait) {
G::consider_builtin_pointee_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Future) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Future) {
G::consider_builtin_future_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Iterator) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Iterator) {
G::consider_builtin_iterator_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::FusedIterator) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::FusedIterator) {
G::consider_builtin_fused_iterator_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::AsyncIterator) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::AsyncIterator) {
G::consider_builtin_async_iterator_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Coroutine) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Coroutine) {
G::consider_builtin_coroutine_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::DiscriminantKind) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::DiscriminantKind) {
G::consider_builtin_discriminant_kind_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::AsyncDestruct) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::AsyncDestruct) {
G::consider_builtin_async_destruct_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Destruct) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Destruct) {
G::consider_builtin_destruct_candidate(self, goal)
} else if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::TransmuteTrait) {
} else if cx.is_lang_item(trait_def_id, TraitSolverLangItem::TransmuteTrait) {
G::consider_builtin_transmute_candidate(self, goal)
} else {
Err(NoSolution)
@@ -428,7 +428,7 @@ where
// There may be multiple unsize candidates for a trait with several supertraits:
// `trait Foo: Bar<A> + Bar<B>` and `dyn Foo: Unsize<dyn Bar<_>>`
if tcx.is_lang_item(trait_def_id, TraitSolverLangItem::Unsize) {
if cx.is_lang_item(trait_def_id, TraitSolverLangItem::Unsize) {
candidates.extend(G::consider_structural_builtin_unsize_candidates(self, goal));
}
}
@@ -557,8 +557,8 @@ where
goal: Goal<I, G>,
candidates: &mut Vec<Candidate<I>>,
) {
let tcx = self.cx();
if !tcx.trait_may_be_implemented_via_object(goal.predicate.trait_def_id(tcx)) {
let cx = self.cx();
if !cx.trait_may_be_implemented_via_object(goal.predicate.trait_def_id(cx)) {
return;
}
@@ -596,7 +596,7 @@ where
};
// Do not consider built-in object impls for non-object-safe types.
if bounds.principal_def_id().is_some_and(|def_id| !tcx.trait_is_object_safe(def_id)) {
if bounds.principal_def_id().is_some_and(|def_id| !cx.trait_is_object_safe(def_id)) {
return;
}
@@ -614,7 +614,7 @@ where
self,
CandidateSource::BuiltinImpl(BuiltinImplSource::Misc),
goal,
bound.with_self_ty(tcx, self_ty),
bound.with_self_ty(cx, self_ty),
));
}
}
@@ -624,14 +624,13 @@ where
// since we don't need to look at any supertrait or anything if we are doing
// a projection goal.
if let Some(principal) = bounds.principal() {
let principal_trait_ref = principal.with_self_ty(tcx, self_ty);
for (idx, assumption) in D::elaborate_supertraits(tcx, principal_trait_ref).enumerate()
{
let principal_trait_ref = principal.with_self_ty(cx, self_ty);
for (idx, assumption) in D::elaborate_supertraits(cx, principal_trait_ref).enumerate() {
candidates.extend(G::probe_and_consider_object_bound_candidate(
self,
CandidateSource::BuiltinImpl(BuiltinImplSource::Object(idx)),
goal,
assumption.upcast(tcx),
assumption.upcast(cx),
));
}
}
@@ -649,11 +648,11 @@ where
goal: Goal<I, G>,
candidates: &mut Vec<Candidate<I>>,
) {
let tcx = self.cx();
let cx = self.cx();
candidates.extend(self.probe_trait_candidate(CandidateSource::CoherenceUnknowable).enter(
|ecx| {
let trait_ref = goal.predicate.trait_ref(tcx);
let trait_ref = goal.predicate.trait_ref(cx);
if ecx.trait_ref_is_knowable(goal.param_env, trait_ref)? {
Err(NoSolution)
} else {
@@ -678,9 +677,9 @@ where
goal: Goal<I, G>,
candidates: &mut Vec<Candidate<I>>,
) {
let tcx = self.cx();
let cx = self.cx();
let trait_goal: Goal<I, ty::TraitPredicate<I>> =
goal.with(tcx, goal.predicate.trait_ref(tcx));
goal.with(cx, goal.predicate.trait_ref(cx));
let mut trait_candidates_from_env = vec![];
self.probe(|_| ProbeKind::ShadowedEnvProbing).enter(|ecx| {

112
compiler/rustc_next_trait_solver/src/solve/assembly/structural_traits.rs
View File

@@ -23,7 +23,7 @@ where
D: SolverDelegate<Interner = I>,
I: Interner,
{
let tcx = ecx.cx();
let cx = ecx.cx();
match ty.kind() {
ty::Uint(_)
| ty::Int(_)
@@ -36,7 +36,7 @@ where
| ty::Char => Ok(vec![]),
// Treat `str` like it's defined as `struct str([u8]);`
ty::Str => Ok(vec![ty::Binder::dummy(Ty::new_slice(tcx, Ty::new_u8(tcx)))]),
ty::Str => Ok(vec![ty::Binder::dummy(Ty::new_slice(cx, Ty::new_u8(cx)))]),
ty::Dynamic(..)
| ty::Param(..)
@@ -79,21 +79,21 @@ where
.cx()
.bound_coroutine_hidden_types(def_id)
.into_iter()
.map(|bty| bty.instantiate(tcx, args))
.map(|bty| bty.instantiate(cx, args))
.collect()),
// For `PhantomData<T>`, we pass `T`.
ty::Adt(def, args) if def.is_phantom_data() => Ok(vec![ty::Binder::dummy(args.type_at(0))]),
ty::Adt(def, args) => {
Ok(def.all_field_tys(tcx).iter_instantiated(tcx, args).map(ty::Binder::dummy).collect())
Ok(def.all_field_tys(cx).iter_instantiated(cx, args).map(ty::Binder::dummy).collect())
}
ty::Alias(ty::Opaque, ty::AliasTy { def_id, args, .. }) => {
// We can resolve the `impl Trait` to its concrete type,
// which enforces a DAG between the functions requiring
// the auto trait bounds in question.
Ok(vec![ty::Binder::dummy(tcx.type_of(def_id).instantiate(tcx, args))])
Ok(vec![ty::Binder::dummy(cx.type_of(def_id).instantiate(cx, args))])
}
}
}
@@ -247,18 +247,18 @@ where
// Returns a binder of the tupled inputs types and output type from a builtin callable type.
pub(in crate::solve) fn extract_tupled_inputs_and_output_from_callable<I: Interner>(
tcx: I,
cx: I,
self_ty: I::Ty,
goal_kind: ty::ClosureKind,
) -> Result<Option<ty::Binder<I, (I::Ty, I::Ty)>>, NoSolution> {
match self_ty.kind() {
// keep this in sync with assemble_fn_pointer_candidates until the old solver is removed.
ty::FnDef(def_id, args) => {
let sig = tcx.fn_sig(def_id);
if sig.skip_binder().is_fn_trait_compatible() && !tcx.has_target_features(def_id) {
let sig = cx.fn_sig(def_id);
if sig.skip_binder().is_fn_trait_compatible() && !cx.has_target_features(def_id) {
Ok(Some(
sig.instantiate(tcx, args)
.map_bound(|sig| (Ty::new_tup(tcx, sig.inputs().as_slice()), sig.output())),
sig.instantiate(cx, args)
.map_bound(|sig| (Ty::new_tup(cx, sig.inputs().as_slice()), sig.output())),
))
} else {
Err(NoSolution)
@@ -268,7 +268,7 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_callable<I: Intern
ty::FnPtr(sig) => {
if sig.is_fn_trait_compatible() {
Ok(Some(
sig.map_bound(|sig| (Ty::new_tup(tcx, sig.inputs().as_slice()), sig.output())),
sig.map_bound(|sig| (Ty::new_tup(cx, sig.inputs().as_slice()), sig.output())),
))
} else {
Err(NoSolution)
@@ -323,10 +323,10 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_callable<I: Intern
}
coroutine_closure_to_certain_coroutine(
tcx,
cx,
goal_kind,
// No captures by ref, so this doesn't matter.
Region::new_static(tcx),
Region::new_static(cx),
def_id,
args,
sig,
@@ -339,9 +339,9 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_callable<I: Intern
}
coroutine_closure_to_ambiguous_coroutine(
tcx,
cx,
goal_kind, // No captures by ref, so this doesn't matter.
Region::new_static(tcx),
Region::new_static(cx),
def_id,
args,
sig,
@@ -403,7 +403,7 @@ pub(in crate::solve) struct AsyncCallableRelevantTypes<I: Interner> {
// which enforces the closure is actually callable with the given trait. When we
// know the kind already, we can short-circuit this check.
pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I: Interner>(
tcx: I,
cx: I,
self_ty: I::Ty,
goal_kind: ty::ClosureKind,
env_region: I::Region,
@@ -422,9 +422,7 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
return Err(NoSolution);
}
coroutine_closure_to_certain_coroutine(
tcx, goal_kind, env_region, def_id, args, sig,
)
coroutine_closure_to_certain_coroutine(cx, goal_kind, env_region, def_id, args, sig)
} else {
// When we don't know the closure kind (and therefore also the closure's upvars,
// which are computed at the same time), we must delay the computation of the
@@ -435,15 +433,15 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
// coroutine upvars respecting the closure kind.
nested.push(
ty::TraitRef::new(
tcx,
tcx.require_lang_item(TraitSolverLangItem::AsyncFnKindHelper),
[kind_ty, Ty::from_closure_kind(tcx, goal_kind)],
cx,
cx.require_lang_item(TraitSolverLangItem::AsyncFnKindHelper),
[kind_ty, Ty::from_closure_kind(cx, goal_kind)],
)
.upcast(tcx),
.upcast(cx),
);
coroutine_closure_to_ambiguous_coroutine(
tcx, goal_kind, env_region, def_id, args, sig,
cx, goal_kind, env_region, def_id, args, sig,
)
};
@@ -458,21 +456,21 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
}
ty::FnDef(..) | ty::FnPtr(..) => {
let bound_sig = self_ty.fn_sig(tcx);
let bound_sig = self_ty.fn_sig(cx);
let sig = bound_sig.skip_binder();
let future_trait_def_id = tcx.require_lang_item(TraitSolverLangItem::Future);
let future_trait_def_id = cx.require_lang_item(TraitSolverLangItem::Future);
// `FnDef` and `FnPtr` only implement `AsyncFn*` when their
// return type implements `Future`.
let nested = vec![
bound_sig
.rebind(ty::TraitRef::new(tcx, future_trait_def_id, [sig.output()]))
.upcast(tcx),
.rebind(ty::TraitRef::new(cx, future_trait_def_id, [sig.output()]))
.upcast(cx),
];
let future_output_def_id = tcx.require_lang_item(TraitSolverLangItem::FutureOutput);
let future_output_ty = Ty::new_projection(tcx, future_output_def_id, [sig.output()]);
let future_output_def_id = cx.require_lang_item(TraitSolverLangItem::FutureOutput);
let future_output_ty = Ty::new_projection(cx, future_output_def_id, [sig.output()]);
Ok((
bound_sig.rebind(AsyncCallableRelevantTypes {
tupled_inputs_ty: Ty::new_tup(tcx, sig.inputs().as_slice()),
tupled_inputs_ty: Ty::new_tup(cx, sig.inputs().as_slice()),
output_coroutine_ty: sig.output(),
coroutine_return_ty: future_output_ty,
}),
@@ -483,13 +481,13 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
let args = args.as_closure();
let bound_sig = args.sig();
let sig = bound_sig.skip_binder();
let future_trait_def_id = tcx.require_lang_item(TraitSolverLangItem::Future);
let future_trait_def_id = cx.require_lang_item(TraitSolverLangItem::Future);
// `Closure`s only implement `AsyncFn*` when their return type
// implements `Future`.
let mut nested = vec![
bound_sig
.rebind(ty::TraitRef::new(tcx, future_trait_def_id, [sig.output()]))
.upcast(tcx),
.rebind(ty::TraitRef::new(cx, future_trait_def_id, [sig.output()]))
.upcast(cx),
];
// Additionally, we need to check that the closure kind
@@ -501,7 +499,7 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
}
} else {
let async_fn_kind_trait_def_id =
tcx.require_lang_item(TraitSolverLangItem::AsyncFnKindHelper);
cx.require_lang_item(TraitSolverLangItem::AsyncFnKindHelper);
// When we don't know the closure kind (and therefore also the closure's upvars,
// which are computed at the same time), we must delay the computation of the
// generator's upvars. We do this using the `AsyncFnKindHelper`, which as a trait
@@ -511,16 +509,16 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
// coroutine upvars respecting the closure kind.
nested.push(
ty::TraitRef::new(
tcx,
cx,
async_fn_kind_trait_def_id,
[kind_ty, Ty::from_closure_kind(tcx, goal_kind)],
[kind_ty, Ty::from_closure_kind(cx, goal_kind)],
)
.upcast(tcx),
.upcast(cx),
);
}
let future_output_def_id = tcx.require_lang_item(TraitSolverLangItem::FutureOutput);
let future_output_ty = Ty::new_projection(tcx, future_output_def_id, [sig.output()]);
let future_output_def_id = cx.require_lang_item(TraitSolverLangItem::FutureOutput);
let future_output_ty = Ty::new_projection(cx, future_output_def_id, [sig.output()]);
Ok((
bound_sig.rebind(AsyncCallableRelevantTypes {
tupled_inputs_ty: sig.inputs().get(0).unwrap(),
@@ -565,7 +563,7 @@ pub(in crate::solve) fn extract_tupled_inputs_and_output_from_async_callable<I:
/// Given a coroutine-closure, project to its returned coroutine when we are *certain*
/// that the closure's kind is compatible with the goal.
fn coroutine_closure_to_certain_coroutine<I: Interner>(
tcx: I,
cx: I,
goal_kind: ty::ClosureKind,
goal_region: I::Region,
def_id: I::DefId,
@@ -573,9 +571,9 @@ fn coroutine_closure_to_certain_coroutine<I: Interner>(
sig: ty::CoroutineClosureSignature<I>,
) -> I::Ty {
sig.to_coroutine_given_kind_and_upvars(
tcx,
cx,
args.parent_args(),
tcx.coroutine_for_closure(def_id),
cx.coroutine_for_closure(def_id),
goal_kind,
goal_region,
args.tupled_upvars_ty(),
@@ -589,20 +587,20 @@ fn coroutine_closure_to_certain_coroutine<I: Interner>(
///
/// Note that we do not also push a `AsyncFnKindHelper` goal here.
fn coroutine_closure_to_ambiguous_coroutine<I: Interner>(
tcx: I,
cx: I,
goal_kind: ty::ClosureKind,
goal_region: I::Region,
def_id: I::DefId,
args: ty::CoroutineClosureArgs<I>,
sig: ty::CoroutineClosureSignature<I>,
) -> I::Ty {
let upvars_projection_def_id = tcx.require_lang_item(TraitSolverLangItem::AsyncFnKindUpvars);
let upvars_projection_def_id = cx.require_lang_item(TraitSolverLangItem::AsyncFnKindUpvars);
let tupled_upvars_ty = Ty::new_projection(
tcx,
cx,
upvars_projection_def_id,
[
I::GenericArg::from(args.kind_ty()),
Ty::from_closure_kind(tcx, goal_kind).into(),
Ty::from_closure_kind(cx, goal_kind).into(),
goal_region.into(),
sig.tupled_inputs_ty.into(),
args.tupled_upvars_ty().into(),
@@ -610,10 +608,10 @@ fn coroutine_closure_to_ambiguous_coroutine<I: Interner>(
],
);
sig.to_coroutine(
tcx,
cx,
args.parent_args(),
Ty::from_closure_kind(tcx, goal_kind),
tcx.coroutine_for_closure(def_id),
Ty::from_closure_kind(cx, goal_kind),
cx.coroutine_for_closure(def_id),
tupled_upvars_ty,
)
}
@@ -668,28 +666,28 @@ where
D: SolverDelegate<Interner = I>,
I: Interner,
{
let tcx = ecx.cx();
let cx = ecx.cx();
let mut requirements = vec![];
requirements
.extend(tcx.super_predicates_of(trait_ref.def_id).iter_instantiated(tcx, trait_ref.args));
.extend(cx.super_predicates_of(trait_ref.def_id).iter_instantiated(cx, trait_ref.args));
// FIXME(associated_const_equality): Also add associated consts to
// the requirements here.
for associated_type_def_id in tcx.associated_type_def_ids(trait_ref.def_id) {
for associated_type_def_id in cx.associated_type_def_ids(trait_ref.def_id) {
// associated types that require `Self: Sized` do not show up in the built-in
// implementation of `Trait for dyn Trait`, and can be dropped here.
if tcx.generics_require_sized_self(associated_type_def_id) {
if cx.generics_require_sized_self(associated_type_def_id) {
continue;
}
requirements
.extend(tcx.item_bounds(associated_type_def_id).iter_instantiated(tcx, trait_ref.args));
.extend(cx.item_bounds(associated_type_def_id).iter_instantiated(cx, trait_ref.args));
}
let mut replace_projection_with = HashMap::default();
for bound in object_bounds.iter() {
if let ty::ExistentialPredicate::Projection(proj) = bound.skip_binder() {
let proj = proj.with_self_ty(tcx, trait_ref.self_ty());
let proj = proj.with_self_ty(cx, trait_ref.self_ty());
let old_ty = replace_projection_with.insert(proj.def_id(), bound.rebind(proj));
assert_eq!(
old_ty,
@@ -709,7 +707,7 @@ where
folder
.nested
.into_iter()
.chain(folded_requirements.into_iter().map(|clause| Goal::new(tcx, param_env, clause)))
.chain(folded_requirements.into_iter().map(|clause| Goal::new(cx, param_env, clause)))
.collect()
}