diff options
Diffstat (limited to 'compiler/rustc_borrowck/src/type_check/constraint_conversion.rs')
-rw-r--r-- | compiler/rustc_borrowck/src/type_check/constraint_conversion.rs | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs b/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs index e15d1b99a..a93561350 100644 --- a/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs +++ b/compiler/rustc_borrowck/src/type_check/constraint_conversion.rs @@ -6,8 +6,8 @@ use rustc_infer::infer::region_constraints::{GenericKind, VerifyBound}; use rustc_infer::infer::{self, InferCtxt, SubregionOrigin}; use rustc_middle::mir::{ClosureOutlivesSubject, ClosureRegionRequirements, ConstraintCategory}; use rustc_middle::ty::subst::GenericArgKind; -use rustc_middle::ty::TypeFoldable; use rustc_middle::ty::{self, TyCtxt}; +use rustc_middle::ty::{TypeFoldable, TypeVisitableExt}; use rustc_span::{Span, DUMMY_SP}; use crate::{ @@ -83,16 +83,8 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { } self.constraints.member_constraints = tmp; - for (predicate, constraint_category) in outlives { - // At the moment, we never generate any "higher-ranked" - // region constraints like `for<'a> 'a: 'b`. At some point - // when we move to universes, we will, and this assertion - // will start to fail. - let predicate = predicate.no_bound_vars().unwrap_or_else(|| { - bug!("query_constraint {:?} contained bound vars", predicate,); - }); - - self.convert(predicate, *constraint_category); + for &(predicate, constraint_category) in outlives { + self.convert(predicate, constraint_category); } } @@ -124,7 +116,9 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { let outlived_region = closure_mapping[outlives_requirement.outlived_free_region]; let subject = match outlives_requirement.subject { ClosureOutlivesSubject::Region(re) => closure_mapping[re].into(), - ClosureOutlivesSubject::Ty(ty) => ty.into(), + ClosureOutlivesSubject::Ty(subject_ty) => { + subject_ty.instantiate(self.tcx, |vid| closure_mapping[vid]).into() + } }; self.category = outlives_requirement.category; @@ -179,7 +173,7 @@ impl<'a, 'tcx> ConstraintConversion<'a, 'tcx> { /// /// FIXME: This should get removed once higher ranked region obligations /// are dealt with during trait solving. - fn replace_placeholders_with_nll<T: TypeFoldable<'tcx>>(&mut self, value: T) -> T { + fn replace_placeholders_with_nll<T: TypeFoldable<TyCtxt<'tcx>>>(&mut self, value: T) -> T { if value.has_placeholders() { self.tcx.fold_regions(value, |r, _| match *r { ty::RePlaceholder(placeholder) => { |