From 3c07aad4bc062f4fc192853461d5bc3e304795b5 Mon Sep 17 00:00:00 2001
From: "Mathias R. Jessen" <IISResetMe@users.noreply.github.com>
Date: Thu, 14 May 2020 19:24:28 +0200
Subject: [PATCH] Fix path handling bug in `PSTask` (#12554)

---
 .../engine/hostifaces/PSTask.cs               |  7 ++++++-
 .../Foreach-Object-Parallel.Tests.ps1         | 21 +++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/System.Management.Automation/engine/hostifaces/PSTask.cs b/src/System.Management.Automation/engine/hostifaces/PSTask.cs
index 0c63c2a0b7..fe42bd55d2 100644
--- a/src/System.Management.Automation/engine/hostifaces/PSTask.cs
+++ b/src/System.Management.Automation/engine/hostifaces/PSTask.cs
@@ -447,7 +447,12 @@ namespace System.Management.Automation.PSTasks
                 try
                 {
                     Runspace.DefaultRunspace = runspace;
-                    runspace.ExecutionContext.SessionState.Internal.SetLocation(_currentLocationPath);
+                    var context = new CmdletProviderContext(runspace.ExecutionContext)
+                    {
+                        // _currentLocationPath denotes the current path as-is, and should not be attempted expanded.
+                        SuppressWildcardExpansion = true
+                    };
+                    runspace.ExecutionContext.SessionState.Internal.SetLocation(_currentLocationPath, context);
                 }
                 catch (DriveNotFoundException)
                 {
diff --git a/test/powershell/Modules/Microsoft.PowerShell.Utility/Foreach-Object-Parallel.Tests.ps1 b/test/powershell/Modules/Microsoft.PowerShell.Utility/Foreach-Object-Parallel.Tests.ps1
index eadf67ae4c..484454e3a8 100644
--- a/test/powershell/Modules/Microsoft.PowerShell.Utility/Foreach-Object-Parallel.Tests.ps1
+++ b/test/powershell/Modules/Microsoft.PowerShell.Utility/Foreach-Object-Parallel.Tests.ps1
@@ -105,6 +105,27 @@ Describe 'ForEach-Object -Parallel Basic Tests' -Tags 'CI' {
         $parallelScriptLocation.Path | Should -BeExactly $PWD.Path
     }
 
+    It 'Verifies that the current working directory can have wildcards in its name' {
+        $oldLocation = Get-Location
+
+        $wildcardName = New-Item -Path 'TestDrive:\' -Name '[' -ItemType Directory
+        Set-Location -LiteralPath $wildcardName.FullName
+        try
+        {
+            { 1..1 | ForEach-Object -Parallel { $PWD } } | Should -Not -Throw
+
+            $wildcardPathResult = 1..1 | ForEach-Object -Parallel { $PWD }
+            $wildcardPathResult.Path | Should -BeExactly $PWD.Path
+        }
+        finally
+        {
+            Set-Location -Path $oldLocation
+            if ($drive -is [System.IO.DirectoryInfo]) {
+                $drive | Remove-Item -Force
+            }
+        }
+    }
+
     It 'Verifies no terminating error if current working drive is not found' {
         $oldLocation = Get-Location
         try