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next-solver: disable unnecessary hack #134574

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Merged
merged 1 commit into from
Dec 20, 2024
Merged

next-solver: disable unnecessary hack #134574

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13 changes: 7 additions & 6 deletions compiler/rustc_borrowck/src/region_infer/opaque_types.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -134,12 +134,13 @@ impl<'tcx> RegionInferenceContext<'tcx> {
// the hidden type becomes the opaque type itself. In this case, this was an opaque
// usage of the opaque type and we can ignore it. This check is mirrored in typeck's
// writeback.
// FIXME(-Znext-solver): This should be unnecessary with the new solver.
if let ty::Alias(ty::Opaque, alias_ty) = ty.kind()
&& alias_ty.def_id == opaque_type_key.def_id.to_def_id()
&& alias_ty.args == opaque_type_key.args
{
continue;
if !infcx.next_trait_solver() {
if let ty::Alias(ty::Opaque, alias_ty) = ty.kind()
&& alias_ty.def_id == opaque_type_key.def_id.to_def_id()
&& alias_ty.args == opaque_type_key.args
{
continue;
}
}
// Sometimes two opaque types are the same only after we remap the generic parameters
// back to the opaque type definition. E.g. we may have `OpaqueType<X, Y>` mapped to
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12 changes: 7 additions & 5 deletions compiler/rustc_hir_typeck/src/writeback.rs
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Expand Up @@ -554,11 +554,13 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> {
let hidden_type = self.resolve(decl.hidden_type, &decl.hidden_type.span);
let opaque_type_key = self.resolve(opaque_type_key, &decl.hidden_type.span);

if let ty::Alias(ty::Opaque, alias_ty) = hidden_type.ty.kind()
&& alias_ty.def_id == opaque_type_key.def_id.to_def_id()
&& alias_ty.args == opaque_type_key.args
{
continue;
if !self.fcx.next_trait_solver() {
if let ty::Alias(ty::Opaque, alias_ty) = hidden_type.ty.kind()
&& alias_ty.def_id == opaque_type_key.def_id.to_def_id()
&& alias_ty.args == opaque_type_key.args
{
continue;
}
}

// Here we only detect impl trait definition conflicts when they
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