From c13f81905a3241dcef5ec9273eb5dfb326e83beb Mon Sep 17 00:00:00 2001
From: "W. Felix Handte" <w@felixhandte.com>
Date: Wed, 6 Nov 2019 16:05:02 -0500
Subject: [PATCH] Fix #1861: Restrict overlapLog Parameter When Not Built With
 Multithreading

This parameter is unused in single-threaded compression. We should make it
behave like the other multithread-only parameters, for which we only accept
zero when we are not built with multithreading.
---
 lib/compress/zstd_compress.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 35346b92..edeac4b9 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -339,8 +339,13 @@ ZSTD_bounds ZSTD_cParam_getBounds(ZSTD_cParameter param)
         return bounds;
 
     case ZSTD_c_overlapLog:
+#ifdef ZSTD_MULTITHREAD
         bounds.lowerBound = ZSTD_OVERLAPLOG_MIN;
         bounds.upperBound = ZSTD_OVERLAPLOG_MAX;
+#else
+        bounds.lowerBound = 0;
+        bounds.upperBound = 0;
+#endif
         return bounds;
 
     case ZSTD_c_enableLongDistanceMatching: