Rustup to rust-lang/rust#89336

Author: JohnTitor

Diff for: rust-toolchain

@@ -1,4 +1,4 @@
 # NOTE: Keep in sync with nightly date on README
 [toolchain]
-channel = "nightly-2021-12-20"
+channel = "nightly-2021-12-31"
 components = ["llvm-tools-preview", "rustc-dev"]

Diff for: src/mismatch.rs

@@ -202,7 +202,7 @@ impl<'a, 'tcx> TypeRelation<'tcx> for MismatchRelation<'a, 'tcx> {
                     self,
                     a_mt,
                     b_mt,
-                    ty::VarianceDiagMutKind::RawPtr,
+                    a,
                 )?;
                 None
             }