diff --git a/rust-version b/rust-version
index fb6d167ec64..a829ec0f5a0 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-nightly-2018-11-12
+nightly-2018-11-15
diff --git a/src/lib.rs b/src/lib.rs
index ab34841df89..b7deb8ee116 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -446,15 +446,6 @@ impl<'a, 'mir, 'tcx> Machine<'a, 'mir, 'tcx> for Evaluator<'tcx> {
         Cow::Owned(alloc)
     }
 
-    #[inline(always)]
-    fn memory_deallocated(
-        alloc: &mut Allocation<Borrow, Self::AllocExtra>,
-        ptr: Pointer<Borrow>,
-        size: Size,
-    ) -> EvalResult<'tcx> {
-        alloc.extra.memory_deallocated(ptr, size)
-    }
-
     #[inline(always)]
     fn tag_reference(
         ecx: &mut EvalContext<'a, 'mir, 'tcx, Self>,
diff --git a/src/stacked_borrows.rs b/src/stacked_borrows.rs
index 475033d74c6..c6cd7f5005d 100644
--- a/src/stacked_borrows.rs
+++ b/src/stacked_borrows.rs
@@ -363,20 +363,20 @@ impl AllocationExtra<Borrow> for Stacks {
         // Writes behave exactly like the first half of a reborrow-to-mut
         alloc.extra.use_and_maybe_re_borrow(ptr, size, UsageKind::Write, None)
     }
-}
 
-impl<'tcx> Stacks {
     #[inline(always)]
-    pub fn memory_deallocated(
-        &mut self,
+    fn memory_deallocated<'tcx>(
+        alloc: &mut Allocation<Borrow, Stacks>,
         ptr: Pointer<Borrow>,
         size: Size,
     ) -> EvalResult<'tcx> {
         // This is like mutating
-        self.use_and_maybe_re_borrow(ptr, size, UsageKind::Write, None)
+        alloc.extra.use_and_maybe_re_borrow(ptr, size, UsageKind::Write, None)
         // FIXME: Error out of there are any barriers?
     }
+}
 
+impl<'tcx> Stacks {
     /// Pushes the first item to the stacks.
     pub fn first_item(
         &mut self,