--- a/src/java.base/share/native/libzip/Deflater.c	Tue Oct 08 15:30:39 2019 +0200
+++ b/src/java.base/share/native/libzip/Deflater.c	Wed Oct 09 10:14:03 2019 +0000
@@ -257,7 +257,7 @@
 
     res = doDeflate(env, addr, input, inputLen, output + outputOff, outputLen,
                     flush, params);
-    (*env)->ReleasePrimitiveArrayCritical(env, outputArray, input, 0);
+    (*env)->ReleasePrimitiveArrayCritical(env, outputArray, output, 0);
 
     retVal = checkDeflateStatus(env, addr, inputLen, outputLen, params, res);
     return retVal;

--- a/test/jdk/java/util/zip/FlaterTest.java	Tue Oct 08 15:30:39 2019 +0200
+++ b/test/jdk/java/util/zip/FlaterTest.java	Wed Oct 09 10:14:03 2019 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,10 +23,11 @@
 
 /**
  * @test
- * @bug 6348045 6341887
+ * @bug 6348045 6341887 8231770
  * @summary GZipOutputStream/InputStream goes critical(calls JNI_Get*Critical)
- * and causes slowness.  This test uses Deflater and Inflater directly.
+ * and causes slowness. This test uses Deflater and Inflater directly.
  * @key randomness
+ * @run main/othervm -Xcheck:jni FlaterTest
  */
 
 import java.nio.*;