New upstream version 1.61.0+dfsg1

[rustc.git] / compiler / rustc_infer / src / infer / undo_log.rs

diff --git a/compiler/rustc_infer/src/infer/undo_log.rs b/compiler/rustc_infer/src/infer/undo_log.rs
index ecd886b547834f3b86a7966c63fb8772f56fd2d4..1b696f21cbcf479364509311159e6912478123d5 100644 (file)
--- a/compiler/rustc_infer/src/infer/undo_log.rs
+++ b/compiler/rustc_infer/src/infer/undo_log.rs
@@ -4,7 +4,7 @@ use rustc_data_structures::snapshot_vec as sv;
 use rustc_data_structures::undo_log::{Rollback, UndoLogs};
 use rustc_data_structures::unify as ut;
 use rustc_middle::infer::unify_key::RegionVidKey;
-use rustc_middle::ty;
+use rustc_middle::ty::{self, OpaqueHiddenType, OpaqueTypeKey};
 
 use crate::{
     infer::{region_constraints, type_variable, InferCtxtInner},
@@ -19,6 +19,7 @@ pub struct Snapshot<'tcx> {
 /// Records the "undo" data for a single operation that affects some form of inference variable.
 #[derive(Clone)]
 pub(crate) enum UndoLog<'tcx> {
+    OpaqueTypes(OpaqueTypeKey<'tcx>, Option<OpaqueHiddenType<'tcx>>),
     TypeVariables(type_variable::UndoLog<'tcx>),
     ConstUnificationTable(sv::UndoLog<ut::Delegate<ty::ConstVid<'tcx>>>),
     IntUnificationTable(sv::UndoLog<ut::Delegate<ty::IntVid>>),
@@ -65,6 +66,7 @@ impl_from! {
 impl<'tcx> Rollback<UndoLog<'tcx>> for InferCtxtInner<'tcx> {
     fn reverse(&mut self, undo: UndoLog<'tcx>) {
         match undo {
+            UndoLog::OpaqueTypes(key, idx) => self.opaque_type_storage.remove(key, idx),
             UndoLog::TypeVariables(undo) => self.type_variable_storage.reverse(undo),
             UndoLog::ConstUnificationTable(undo) => self.const_unification_storage.reverse(undo),
             UndoLog::IntUnificationTable(undo) => self.int_unification_storage.reverse(undo),