Fix foreach parallel when current drive is not available (#12197)

src/System.Management.Automation/engine/hostifaces/PSTask.cs

@@ -449,6 +449,10 @@ namespace System.Management.Automation.PSTasks
                     Runspace.DefaultRunspace = runspace;
                     runspace.ExecutionContext.SessionState.Internal.SetLocation(_currentLocationPath);
                 }
+                catch (DriveNotFoundException)
+                {
+                    // Allow task to run if current drive is not available.
+                }
                 finally
                 {
                     Runspace.DefaultRunspace = oldDefaultRunspace;

test/powershell/Modules/Microsoft.PowerShell.Utility/Foreach-Object-Parallel.Tests.ps1

@@ -104,6 +104,20 @@ Describe 'ForEach-Object -Parallel Basic Tests' -Tags 'CI' {
         $parallelScriptLocation = 1..1 | ForEach-Object -Parallel { $PWD }
         $parallelScriptLocation.Path | Should -BeExactly $PWD.Path
     }
+
+    It 'Verifies no terminating error if current working drive is not found' {
+        $oldLocation = Get-Location
+        try
+        {
+            New-PSDrive -Name ZZ -PSProvider FileSystem -Root $TestDrive
+            Set-Location -Path 'ZZ:'
+            { 1..1 | ForEach-Object -Parallel { $_ } } | Should -Not -Throw
+        }
+        finally
+        {
+            Set-Location -Path $oldLocation
+        }
+    }
 }
 
 Describe 'ForEach-Object -Parallel common parameters' -Tags 'CI' {