From 30f26b4c5416d99cfb00de98996d910915b39925 Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Thu, 19 Nov 2020 23:41:43 +0100
Subject: [PATCH 1/4] Enable nullable:
 System.Management.Automation.Language.IAstPostVisitHandler

---
 .../engine/parser/PreOrderVisitor.cs                            | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
index 0bf5368fddb..7b82b12fd3a 100644
--- a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
+++ b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
@@ -250,6 +250,8 @@ public abstract class AstVisitor2 : AstVisitor
         public virtual AstVisitAction VisitPipelineChain(PipelineChainAst statementChain) => DefaultVisit(statementChain);
     }
 
+#nullable enable
+
     /// <summary>
     /// Implement this interface when you implement <see cref="AstVisitor"/> or <see cref="AstVisitor2"/> when
     /// you want to do something after possibly visiting the children of the ast.

From d36d1020b04455f9ce06d171fd8be6ad07e5f120 Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Fri, 20 Nov 2020 18:52:39 +0100
Subject: [PATCH 2/4] Removing whitespace before/after nullable pragma

---
 .../engine/parser/PreOrderVisitor.cs                             | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
index 7b82b12fd3a..890d0d50fcf 100644
--- a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
+++ b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
@@ -251,7 +251,6 @@ public abstract class AstVisitor2 : AstVisitor
     }
 
 #nullable enable
-
     /// <summary>
     /// Implement this interface when you implement <see cref="AstVisitor"/> or <see cref="AstVisitor2"/> when
     /// you want to do something after possibly visiting the children of the ast.

From 934de9c56cf51a5e5ab9e37df958e01bf95d5164 Mon Sep 17 00:00:00 2001
From: Staffan Gustafsson <staffangu@outlook.com>
Date: Fri, 20 Nov 2020 19:25:16 +0100
Subject: [PATCH 3/4] Removing whitespace before/after nullable pragma

---
 .../engine/parser/PreOrderVisitor.cs                           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
index 890d0d50fcf..ddd48c1a04f 100644
--- a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
+++ b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
@@ -250,11 +250,12 @@ public abstract class AstVisitor2 : AstVisitor
         public virtual AstVisitAction VisitPipelineChain(PipelineChainAst statementChain) => DefaultVisit(statementChain);
     }
 
-#nullable enable
+
     /// <summary>
     /// Implement this interface when you implement <see cref="AstVisitor"/> or <see cref="AstVisitor2"/> when
     /// you want to do something after possibly visiting the children of the ast.
     /// </summary>
+#nullable enable
     public interface IAstPostVisitHandler
     {
         /// <summary>

From fd777be0d22d2976623ac8e0836a1c99d03d6c13 Mon Sep 17 00:00:00 2001
From: Robert Holt <rjmholt@gmail.com>
Date: Wed, 9 Dec 2020 11:58:03 -0800
Subject: [PATCH 4/4] Update
 src/System.Management.Automation/engine/parser/PreOrderVisitor.cs

---
 .../engine/parser/PreOrderVisitor.cs                             | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
index ddd48c1a04f..33b2fadec64 100644
--- a/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
+++ b/src/System.Management.Automation/engine/parser/PreOrderVisitor.cs
@@ -250,7 +250,6 @@ public abstract class AstVisitor2 : AstVisitor
         public virtual AstVisitAction VisitPipelineChain(PipelineChainAst statementChain) => DefaultVisit(statementChain);
     }
 
-
     /// <summary>
     /// Implement this interface when you implement <see cref="AstVisitor"/> or <see cref="AstVisitor2"/> when
     /// you want to do something after possibly visiting the children of the ast.