Fix wrongly refactored Lift impl

rust-lang · Sep 21, 2022 · 3e6c9e5 · 3e6c9e5
1 parent 1de00d1
commit 3e6c9e5
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs
@@ -272,7 +272,10 @@ impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>, C: Lift<'tcx>> Lift<'tcx> for (A, B, C)
 impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Option<T> {
     type Lifted = Option<T::Lifted>;
     fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
-        tcx.lift(self?).map(Some)
+        Some(match self {
+            Some(x) => Some(tcx.lift(x)?),
+            None => None,
+        })
     }
 }