From dc5a67cb7b84a86bb3729ae4a85ef61e37797ac2 Mon Sep 17 00:00:00 2001
From: Nick Terrell <terrelln@fb.com>
Date: Thu, 2 Aug 2018 11:12:17 -0700
Subject: [PATCH] Disallow tableLog == srcLog

---
 lib/compress/fse_compress.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/compress/fse_compress.c b/lib/compress/fse_compress.c
index 95e7c1c7..70daae3b 100644
--- a/lib/compress/fse_compress.c
+++ b/lib/compress/fse_compress.c
@@ -331,7 +331,7 @@ void FSE_freeCTable (FSE_CTable* ct) { free(ct); }
 /* provides the minimum logSize to safely represent a distribution */
 static unsigned FSE_minTableLog(size_t srcSize, unsigned maxSymbolValue)
 {
-    U32 minBitsSrc = BIT_highbit32((U32)(srcSize - 1)) + 1;
+    U32 minBitsSrc = BIT_highbit32((U32)(srcSize)) + 1;
     U32 minBitsSymbols = BIT_highbit32(maxSymbolValue) + 2;
     U32 minBits = minBitsSrc < minBitsSymbols ? minBitsSrc : minBitsSymbols;
     assert(srcSize > 1); /* Not supported, RLE should be used instead */