From 8529b38f6027e698a37dd24234e1c658c8bd412a Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Wed, 8 Feb 2023 15:08:10 -0800
Subject: [PATCH] [Lex] Fix -Wunused-variable for LLVM_ENABLE_ASSERTIONS=off
 builds after D140179

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

diff --git a/clang/lib/Lex/Preprocessor.cpp b/clang/lib/Lex/Preprocessor.cpp
index 924a7e6..ba55174 100644
--- a/clang/lib/Lex/Preprocessor.cpp
+++ b/clang/lib/Lex/Preprocessor.cpp
@@ -1497,7 +1497,7 @@ bool Preprocessor::enterOrExitSafeBufferOptOutRegion(
     // To set the start location of a new region:
 
     if (!SafeBufferOptOutMap.empty()) {
-      auto *PrevRegion = &SafeBufferOptOutMap.back();
+      [[maybe_unused]] auto *PrevRegion = &SafeBufferOptOutMap.back();
       assert(PrevRegion->first != PrevRegion->second &&
              "Shall not begin a safe buffer opt-out region before closing the "
              "previous one.");
-- 
2.7.4