clean code: remove Deref<Target=RegionKind> impl for Region and use `.kind()`

Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler/rustc_hir_analysis/src/variance/constraints.rs b/compiler/rustc_hir_analysis/src/variance/constraints.rs
index 8475903c68f..23223de918c 100644
--- a/compiler/rustc_hir_analysis/src/variance/constraints.rs
+++ b/compiler/rustc_hir_analysis/src/variance/constraints.rs
@@ -428,7 +428,7 @@ impl<'a, 'tcx> ConstraintContext<'a, 'tcx> {
         region: ty::Region<'tcx>,
         variance: VarianceTermPtr<'a>,
     ) {
-        match *region {
+        match region.kind() {
             ty::ReEarlyParam(ref data) => {
                 self.add_constraint(current, data.index, variance);
             }