From 7a6343fb1bf73f4108a838f001b6836c9ac11465 Mon Sep 17 00:00:00 2001
From: Yann Collet <yann.collet.73@gmail.com>
Date: Tue, 2 Feb 2016 16:00:50 +0100
Subject: [PATCH] fixed encoding bugs

---
 lib/zstd_compress.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/zstd_compress.c b/lib/zstd_compress.c
index 7252d750b..3dd865151 100644
--- a/lib/zstd_compress.c
+++ b/lib/zstd_compress.c
@@ -251,6 +251,7 @@ size_t ZSTD_copyCCtx(ZSTD_CCtx* dstCCtx, const ZSTD_CCtx* srcCCtx)
     dstCCtx->dictBase    = srcCCtx->dictBase;
     dstCCtx->dictLimit   = srcCCtx->dictLimit;
     dstCCtx->lowLimit    = srcCCtx->lowLimit;
+    dstCCtx->loadedDictEnd = srcCCtx->loadedDictEnd;
 
     /* copy entropy tables */
     dstCCtx->flagStaticTables = srcCCtx->flagStaticTables;
@@ -1911,7 +1912,8 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* zc,
         if (remaining < blockSize) blockSize = remaining;
 
         if ((U32)(ip+blockSize - zc->base) > zc->loadedDictEnd + maxDist) { /* enforce maxDist */
-            zc->lowLimit = (U32)(ip+blockSize - zc->base) - maxDist;
+            U32 newLowLimit = (U32)(ip+blockSize - zc->base) - maxDist;
+            if (zc->lowLimit < newLowLimit) zc->lowLimit = newLowLimit;
             if (zc->dictLimit < zc->lowLimit) zc->dictLimit = zc->lowLimit;
         }