From 59312cb0b81ca13f0674dde66b8e87a8d51d4dda Mon Sep 17 00:00:00 2001
From: Michael Liao <michael.hliao@gmail.com>
Date: Tue, 3 Dec 2019 21:15:17 -0500
Subject: [PATCH] Fix warning on unused variable. NFC.

---
 clang/lib/AST/Expr.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index a73531ad5fad..3bc2ea60aa14 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -1678,7 +1678,7 @@ MemberExpr *MemberExpr::Create(
   MemberExpr *E = new (Mem) MemberExpr(Base, IsArrow, OperatorLoc, MemberDecl,
                                        NameInfo, T, VK, OK, NOUR);
 
-  if (FieldDecl *Field = dyn_cast<FieldDecl>(MemberDecl)) {
+  if (isa<FieldDecl>(MemberDecl)) {
     DeclContext *DC = MemberDecl->getDeclContext();
     // dyn_cast_or_null is used to handle objC variables which do not
     // have a declaration context.