From 115402310889908f2173e3c06f3dae34e03606df Mon Sep 17 00:00:00 2001
From: Alex Kocharin <alex@kocharin.ru>
Date: Thu, 9 Jun 2022 16:55:44 +0300
Subject: [PATCH] Fix bug when level 0 used with Z_HUFFMAN or Z_RLE.

https://github.com/madler/zlib/commit/94575859cf7f657f0f31aff4c50761fe3f182699
---
 lib/zlib/deflate.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/zlib/deflate.js b/lib/zlib/deflate.js
index 2fca402..a0df5ba 100644
--- a/lib/zlib/deflate.js
+++ b/lib/zlib/deflate.js
@@ -1666,9 +1666,10 @@ const deflate = (strm, flush) => {
    */
   if (strm.avail_in !== 0 || s.lookahead !== 0 ||
     (flush !== Z_NO_FLUSH && s.status !== FINISH_STATE)) {
-    let bstate = (s.strategy === Z_HUFFMAN_ONLY) ? deflate_huff(s, flush) :
-      (s.strategy === Z_RLE ? deflate_rle(s, flush) :
-        configuration_table[s.level].func(s, flush));
+    let bstate = s.level === 0 ? deflate_stored(s, flush) :
+                 s.strategy === Z_HUFFMAN_ONLY ? deflate_huff(s, flush) :
+                 s.strategy === Z_RLE ? deflate_rle(s, flush) :
+                 configuration_table[s.level].func(s, flush);
 
     if (bstate === BS_FINISH_STARTED || bstate === BS_FINISH_DONE) {
       s.status = FINISH_STATE;