razor: [8.0.100-rc.2.23469.4] "error CS8938: The #line directive value is missing or out of range" exception in MVC app when generating html with Html Helpers

Issue Description:

When retargeting SmartStore (.NET 7.0) and grandnode (.netcore 3.1) apps to .NET 8.0, we get “error CS8938: The #line directive value is missing or out of range” exception for cshtml.g.cs files during building. This exception starts from dotnet-sdk-8.0.100-rc.2.23456.6.

Application Name: Smartstore, grandnode OS： Windows 10 21H2 CPU: X64 .NET Build Number: dotnet-sdk-8.0.100-rc.2.23469.4

Verify Scenarios:

1. Windows10 21h2 x64 + dotnet-sdk-8.0.100-preview.7.23374.6: Pass
2. Windows10 21h2 x64 + dotnet-sdk-8.0.100-rc.1.23455.8： Pass
3. Windows10 21h2 x64 + dotnet-sdk-8.0.100-rc.2.23454.1： Pass
4. Windows10 21h2 x64 + dotnet-sdk-8.0.100-rc.2.23456.6: Fail
5. Windows10 21h2 x64 + dotnet-sdk-8.0.100-rc.2.23469.4: Fail
6. Windows10 21h2 x64 + dotnet-sdk-8.0.100-rc.2.23472.8: Fail

Minimal Repro steps (Demo attached): myapp.zip

The machine has dotnet-sdk-8.0.100-rc.2.23456.6 or higher version installed. ​​1. Open command prompt window to create a MVC project with command: “dotnet new mvc” 2. Open “\Views\Home\Index.cshtml” page file to add below code:

@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <p>Learn about <a href="https://learn.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
@(Html.TextBox("mytestbox")
)  
</div>

1. Build the project.

Expected Result: Build successful.

Actual Result: Build failed with following exception: C:\Users\v-weiwc\Desktop\myapp\myapp\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators. RazorSourceGenerator\Views_Home_Index_cshtml.g.cs(48,17): error CS8938: The #line directive value is missing or out of range [C:\Users\v-weiwc\Desktop\myapp\myapp\myapp.csproj]

Findings:

1. This error start from dotnet-sdk-8.0.100-rc.2.23456.6, previous .NET 8.0 version don’t have this build issue.
2. This error occurs with both VS2022 Preview (Version 17.8.0 Preview 2.0) and dotnet build command.
3. If we use VS2022 with “Use previews of the .NET SDK” enabled, and the machine has .NET 8.0 SDK installed, it can be built successfully in VS2022, but still failed with dotnet build command.

@dotnet-actwx-bot @dotnet/compat