From 7cee28858674d233903e92b7a0c49b07b05ed3d3 Mon Sep 17 00:00:00 2001
From: Michael Liao <michael.hliao@gmail.com>
Date: Sat, 21 Dec 2019 11:09:30 -0500
Subject: [PATCH] Fix `-Wunused-variable` warning. NFC.

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

diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp
index 4fdddfbb7a7e..5fdf6aeed5b4 100644
--- a/clang/lib/Sema/SemaDeclObjC.cpp
+++ b/clang/lib/Sema/SemaDeclObjC.cpp
@@ -4776,7 +4776,7 @@ Decl *Sema::ActOnMethodDeclaration(
             if (auto *Cat = dyn_cast<ObjCCategoryDecl>(IMD->getDeclContext()))
               decl = Cat->IsClassExtension() ? 1 : 2;
 
-            if (auto *Cat = dyn_cast<ObjCCategoryImplDecl>(ImpDecl))
+            if (isa<ObjCCategoryImplDecl>(ImpDecl))
               impl = 1 + (decl != 0);
 
             Diag(ObjCMethod->getLocation(),