--- old/src/java.base/unix/classes/java/lang/ProcessImpl.java	2018-12-07 17:55:14.000000000 +0000
+++ new/src/java.base/unix/classes/java/lang/ProcessImpl.java	2018-12-07 17:55:13.000000000 +0000
@@ -412,7 +412,7 @@
                          new BufferedOutputStream(
                              new FileOutputStream(newFileDescriptor(fds[0])));
  
-                 stdout = (fds[1] == -1) ?
+                 stdout = (fds[1] == -1 || forceNullOutputStream) ?
                           ProcessBuilder.NullInputStream.INSTANCE :
                           new BufferedInputStream(
                               stdout_inner_stream =
@@ -446,7 +446,7 @@
                          ProcessBuilder.NullOutputStream.INSTANCE :
                          new ProcessPipeOutputStream(fds[0]);
  
-                 stdout = (fds[1] == -1) ?
+                 stdout = (fds[1] == -1 || forceNullOutputStream) ?
                           ProcessBuilder.NullInputStream.INSTANCE :
                           new DeferredCloseProcessPipeInputStream(fds[1]);
  
--- old/test/jdk/ProblemList.txt	2018-12-07 17:55:16.000000000 +0000
+++ new/test/jdk/ProblemList.txt	2018-12-07 17:55:16.000000000 +0000
@@ -515,7 +515,6 @@
  # jdk_lang
  
  java/lang/StringCoding/CheckEncodings.sh                        7008363 generic-all
- java/lang/ProcessBuilder/PipelineTest.java                      8211844 aix-ppc64
  java/lang/ProcessHandle/InfoTest.java                           8211847 aix-ppc64
  
  ############################################################################