From 153feb2e6022c138cfedc3c28f2e6745be13617d Mon Sep 17 00:00:00 2001
From: Patrick Meinecke <SeeminglyScience@users.noreply.github.com>
Date: Mon, 17 Jul 2023 14:10:35 -0400
Subject: [PATCH] Fix deadlock when piping to shell associated file extension
 (#19940)

---
 .../engine/NativeCommandProcessor.cs          | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/src/System.Management.Automation/engine/NativeCommandProcessor.cs b/src/System.Management.Automation/engine/NativeCommandProcessor.cs
index b769bc026..326e96dfa 100644
--- a/src/System.Management.Automation/engine/NativeCommandProcessor.cs
+++ b/src/System.Management.Automation/engine/NativeCommandProcessor.cs
@@ -604,19 +604,6 @@ namespace System.Management.Automation
                     {
                         _nativeProcess = new Process() { StartInfo = startInfo };
                         _nativeProcess.Start();
-                        if (UpstreamIsNativeCommand)
-                        {
-                            SemaphoreSlim processInitialized = _processInitialized;
-                            if (processInitialized is null)
-                            {
-                                lock (_sync)
-                                {
-                                    processInitialized = _processInitialized ??= new SemaphoreSlim(0, 1);
-                                }
-                            }
-
-                            processInitialized?.Release();
-                        }
                     }
                     catch (Win32Exception)
                     {
@@ -695,6 +682,12 @@ namespace System.Management.Automation
                         }
 #endif
                     }
+
+                    if (UpstreamIsNativeCommand)
+                    {
+                        _processInitialized ??= new SemaphoreSlim(0, 1);
+                        _processInitialized.Release();
+                    }
                 }
 
                 if (this.Command.MyInvocation.PipelinePosition < this.Command.MyInvocation.PipelineLength)