Fix null reference exception in ForEach-Object -Parallel input processing (PowerShell#10577)

PaulHigin · daxian-dbw · commit ecad5f105d45 · 2019-09-20T10:50:07.000-07:00
diff --git a/src/System.Management.Automation/engine/InternalCommands.cs b/src/System.Management.Automation/engine/InternalCommands.cs
@@ -509,7 +509,8 @@ private void InitParallelParameterSet()
         private void ProcessParallelParameterSet()
         {
             // Validate piped InputObject
-            if (_inputObject.BaseObject is ScriptBlock)
+            if (_inputObject != null && 
+                _inputObject.BaseObject is ScriptBlock)
             {
                 WriteError(
                     new ErrorRecord(

Original file line number	Diff line number	Diff line change
`@@ -509,7 +509,8 @@ private void InitParallelParameterSet()`
`509`	`509`	`private void ProcessParallelParameterSet()`
`510`	`510`	`{`
`511`	`511`	`// Validate piped InputObject`
`512`		`- if (_inputObject.BaseObject is ScriptBlock)`
	`512`	`+ if (_inputObject != null &&`
	`513`	`+ _inputObject.BaseObject is ScriptBlock)`
`513`	`514`	`{`
`514`	`515`	`WriteError(`
`515`	`516`	`new ErrorRecord(`