use Rc to store nonlexical_regioncx in Borrows

1 files changed, 2 insertions, 2 deletions

diff --git a/src/librustc_mir/dataflow/impls/borrows.rs b/src/librustc_mir/dataflow/impls/borrows.rs
index 2504aa5ff37..25e4b30da80 100644
--- a/src/librustc_mir/dataflow/impls/borrows.rs
+++ b/src/librustc_mir/dataflow/impls/borrows.rs
@@ -66,7 +66,7 @@ pub struct Borrows<'a, 'gcx: 'tcx, 'tcx: 'a> {
     region_map: FxHashMap<Region<'tcx>, FxHashSet<BorrowIndex>>,
     local_map: FxHashMap<mir::Local, FxHashSet<BorrowIndex>>,
     region_span_map: FxHashMap<RegionKind, Span>,
-    nonlexical_regioncx: Option<RegionInferenceContext<'tcx>>,
+    nonlexical_regioncx: Option<Rc<RegionInferenceContext<'tcx>>>,
 }
 
 // Two-phase borrows actually requires two flow analyses; they need
@@ -147,7 +147,7 @@ impl ReserveOrActivateIndex {
 impl<'a, 'gcx, 'tcx> Borrows<'a, 'gcx, 'tcx> {
     pub fn new(tcx: TyCtxt<'a, 'gcx, 'tcx>,
                mir: &'a Mir<'tcx>,
-               nonlexical_regioncx: Option<RegionInferenceContext<'tcx>>,
+               nonlexical_regioncx: Option<Rc<RegionInferenceContext<'tcx>>>,
                def_id: DefId,
                body_id: Option<hir::BodyId>)
                -> Self {