Aspnetcore: [Tooling] VS Crash on paste of markup in the functions block

[rynowak]

Describe the bug

Crash on paste. 😢

To Reproduce

Steps to reproduce the behavior:

1. Using latest 3.0 SDK and d16.1stg
2. Create a new Server Side Blazor app
3. Edit Index.razor to contain

@page "/"

<h1>Hello, world!</h1>

Welcome to your new app.

@functions {
    RenderFragment menu = @<div>Hi</div>;

    RenderFragment toprow = @<ul>Hello in the top row.</ul>;
}

1. Highlight <div>Hi</div> and paste in:

        <li class="nav-item px-3">
            <NavLink class="nav-link" href="fetchdata">
                <span class="oi oi-list-rich" aria-hidden="true"></span> Fetch data
            </NavLink>
        </li>

[NTaylorMullen]

@javiercn this looks like the same one you found 😄

[javiercn]

@NTaylorMullen Maybe, but mine contained a GIF to showcase it. @rynowak get on my level bro!

[ajaybhargavb]

Just reproduced and can confirm it is the same callstack as the one @javiercn found.

System.InvalidOperationException
  HResult=0x80131509
  Message=The reference is invalid. The node 'Microsoft.AspNetCore.Razor.Language.Intermediate.TagHelperIntermediateNode' could not be found as a child of 'Microsoft.AspNetCore.Razor.Language.Intermediate.MarkupElementIntermediateNode'.
  Source=Microsoft.AspNetCore.Razor.Language
  StackTrace:
   at Microsoft.AspNetCore.Razor.Language.Intermediate.IntermediateNodeReference.Replace(IntermediateNode node) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\Intermediate\IntermediateNodeReference.cs:line 200
   at Microsoft.AspNetCore.Razor.Language.Components.ComponentLoweringPass.ExecuteCore(RazorCodeDocument codeDocument, DocumentIntermediateNode documentNode) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\Components\ComponentLoweringPass.cs:line 55
   at Microsoft.AspNetCore.Razor.Language.IntermediateNodePassBase.Execute(RazorCodeDocument codeDocument, DocumentIntermediateNode documentNode) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\IntermediateNodePassBase.cs:line 40
   at Microsoft.AspNetCore.Razor.Language.DefaultRazorOptimizationPhase.ExecuteCore(RazorCodeDocument codeDocument) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\DefaultRazorOptimizationPhase.cs:line 24
   at Microsoft.AspNetCore.Razor.Language.RazorEnginePhaseBase.Execute(RazorCodeDocument codeDocument) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\RazorEnginePhaseBase.cs:line 40
   at Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process(RazorCodeDocument document) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\DefaultRazorEngine.cs:line 51
   at Microsoft.AspNetCore.Razor.Language.DefaultRazorProjectEngine.ProcessCore(RazorCodeDocument codeDocument) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\DefaultRazorProjectEngine.cs:line 259
   at Microsoft.AspNetCore.Razor.Language.RazorProjectEngine.ProcessDesignTime(RazorProjectItem projectItem) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.AspNetCore.Razor.Language\RazorProjectEngine.cs:line 66
   at Microsoft.VisualStudio.Editor.Razor.BackgroundParser.BackgroundThread.ParseChange(ITextSnapshot snapshot, CancellationToken token) in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.VisualStudio.Editor.Razor\BackgroundParser.cs:line 358
   at Microsoft.VisualStudio.Editor.Razor.BackgroundParser.BackgroundThread.WorkerLoop() in C:\Github\aspnet\AspNetCore-Tooling\src\Razor\src\Microsoft.VisualStudio.Editor.Razor\BackgroundParser.cs:line 308
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()