From d592209211dcf096e88e22689602a04ac87c6dd7 Mon Sep 17 00:00:00 2001
From: Ben Adams <thundercat@illyriad.co.uk>
Date: Tue, 25 Jul 2017 03:23:50 +0100
Subject: [PATCH] ValueTask .ctor throw to Helper

---
 src/mscorlib/shared/System/Threading/Tasks/ValueTask.cs | 7 ++++++-
 src/mscorlib/src/System/ThrowHelper.cs                  | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/mscorlib/shared/System/Threading/Tasks/ValueTask.cs b/src/mscorlib/shared/System/Threading/Tasks/ValueTask.cs
index bafc8f5..4953880 100644
--- a/src/mscorlib/shared/System/Threading/Tasks/ValueTask.cs
+++ b/src/mscorlib/shared/System/Threading/Tasks/ValueTask.cs
@@ -71,7 +71,12 @@ namespace System.Threading.Tasks
         /// <param name="task">The task.</param>
         public ValueTask(Task<TResult> task)
         {
-            _task = task ?? throw new ArgumentNullException(nameof(task));
+            if (task == null)
+            {
+                ThrowHelper.ThrowArgumentNullException(ExceptionArgument.task);
+            }
+
+            _task = task;
             _result = default(TResult);
         }
 
diff --git a/src/mscorlib/src/System/ThrowHelper.cs b/src/mscorlib/src/System/ThrowHelper.cs
index ff76738..b4fc5a8 100644
--- a/src/mscorlib/src/System/ThrowHelper.cs
+++ b/src/mscorlib/src/System/ThrowHelper.cs
@@ -416,7 +416,8 @@ namespace System
         type,
         stateMachine,
         pHandle,
-        values
+        values,
+        task
     }
 
     //
-- 
2.7.4