React to aspnet/Razor#720.

Author: N. Taylor Mullen

test/Microsoft.AspNetCore.Mvc.Razor.Host.Test/TestFiles/Output/Runtime/ModelExpressionTagHelper.cs

@@ -16,7 +16,7 @@ public class TestFiles_Input_ModelExpressionTagHelper_cshtml : Microsoft.AspNetC
         #pragma warning restore 0414
         private global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext __tagHelperExecutionContext = null;
         private global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner __tagHelperRunner = null;
-        private global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperScopeManager __tagHelperScopeManager = new global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperScopeManager();
+        private global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperScopeManager __tagHelperScopeManager = null;
         private global::Microsoft.AspNetCore.Mvc.Razor.InputTestTagHelper __Microsoft_AspNetCore_Mvc_Razor_InputTestTagHelper = null;
         #line hidden
         public TestFiles_Input_ModelExpressionTagHelper_cshtml()
@@ -38,12 +38,13 @@ public TestFiles_Input_ModelExpressionTagHelper_cshtml()
         public override async Task ExecuteAsync()
         {
             __tagHelperRunner = __tagHelperRunner ?? new global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner();
+            __tagHelperScopeManager = __tagHelperScopeManager ?? new global::Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperScopeManager(StartTagHelperWritingScope, EndTagHelperWritingScope);
             BeginContext(126, 2, true);
             WriteLiteral("\r\n");
             EndContext();
             __tagHelperExecutionContext = __tagHelperScopeManager.Begin("input-test", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.SelfClosing, "test", async() => {
             }
-            , StartTagHelperWritingScope, EndTagHelperWritingScope);
+            );
             __Microsoft_AspNetCore_Mvc_Razor_InputTestTagHelper = CreateTagHelper<global::Microsoft.AspNetCore.Mvc.Razor.InputTestTagHelper>();
             __tagHelperExecutionContext.Add(__Microsoft_AspNetCore_Mvc_Razor_InputTestTagHelper);
 #line 5 "TestFiles/Input/ModelExpressionTagHelper.cshtml"
@@ -62,7 +63,7 @@ public override async Task ExecuteAsync()
             EndContext();
             __tagHelperExecutionContext = __tagHelperScopeManager.Begin("input-test", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.SelfClosing, "test", async() => {
             }
-            , StartTagHelperWritingScope, EndTagHelperWritingScope);
+            );
             __Microsoft_AspNetCore_Mvc_Razor_InputTestTagHelper = CreateTagHelper<global::Microsoft.AspNetCore.Mvc.Razor.InputTestTagHelper>();
             __tagHelperExecutionContext.Add(__Microsoft_AspNetCore_Mvc_Razor_InputTestTagHelper);
 #line 6 "TestFiles/Input/ModelExpressionTagHelper.cshtml"