From 65dc7b383985eb4f63cd3e752136db8d9b4be8c0 Mon Sep 17 00:00:00 2001
From: Snappy Team <no-reply@google.com>
Date: Thu, 28 Oct 2021 04:39:14 +0000
Subject: [PATCH] Pass by reference the first argument of ExtractLowBytes to
 avoid UB of passing uninitialized argument by value.

PiperOrigin-RevId: 406052814
---
 snappy.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snappy.cc b/snappy.cc
index 670b87e..ee9a2c4 100644
--- a/snappy.cc
+++ b/snappy.cc
@@ -954,7 +954,7 @@ static inline void Report(const char *algorithm, size_t compressed_size,
 //   bool TryFastAppend(const char* ip, size_t available, size_t length, T* op);
 // };
 
-static inline uint32_t ExtractLowBytes(uint32_t v, int n) {
+static inline uint32_t ExtractLowBytes(const uint32_t& v, int n) {
   assert(n >= 0);
   assert(n <= 4);
 #if SNAPPY_HAVE_BMI2