From b17fb488b0fd57e7b3c028a54ffd87c1f6878045 Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Sat, 6 Jan 2018 20:50:36 +0100
Subject: [PATCH] fixed msan test

a pointer calculation was wrong in a corner case
---
 lib/compress/zstd_lazy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/compress/zstd_lazy.c b/lib/compress/zstd_lazy.c
index 7261cffc..4af843d1 100644
--- a/lib/compress/zstd_lazy.c
+++ b/lib/compress/zstd_lazy.c
@@ -122,7 +122,7 @@ static void ZSTD_insertDUBT1(ZSTD_CCtx* zc,
         if ( (!extDict)
           || (matchIndex+matchLength >= dictLimit)  /* both in current segment*/
           || (current < dictLimit) /* both in extDict */) {
-            const BYTE* const mBase = !extDict || (matchIndex >= dictLimit) ? base : dictBase;
+            const BYTE* const mBase = !extDict || ((matchIndex+matchLength) >= dictLimit) ? base : dictBase;
             assert( (matchIndex+matchLength >= dictLimit)   /* might be wrong if extDict is incorrectly set to 0 */
                  || (current < dictLimit) );
             match = mBase + matchIndex;