.NET 7.0 RC2 breaks MVC build where a view references an F# model #44749

jonsagara · 2022-10-26T18:15:30Z

Is there an existing issue for this?

I have searched the existing issues

Describe the bug

I have an existing C# ASP.NET Core MVC application that references an F# class library. The F# library exposes several record types that the MVC application consumes directly. The view model class has a reference to one of these F# records and tries to display it in the corresponding view.

F# record:

type TermReportCards = {
    Term : DateTime
    TermName : string
    ReportCards : ReportCard array
    }

C# view model:

public class HomeIndexModel
{
    public List<TermReportCards> TermReportCards { get; private set; } = new();
}

ASP.NET Core MVC Razor view (.cshtml):

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

<div class="text-center">
    <!-- ... -->

    @foreach (var targetReportCard in Model.TermReportCards.OrderBy(trc => trc.Term))
    {
        // noop
    }
</div>

The application has built and functioned correctly for years, including with .NET SDK 6.0.402. However, when I switched to .NET SDK 7.0.100-rc.2.22477.23 and updated the nuget packages and project TFMs accordingly, the MVC project no longer compiles in Release mode.

My environment:

OS: Windows 11 Version 22H2 (OS Build 22621.755)
Visual Studio 2022: Version 17.4.0 Preview 5.0

Expected Behavior

The solution should continue to build without errors, as it has with .NET SDK 6.0.402 and prior releases.

Steps To Reproduce

I have created a solution to reproduce the issue, along with a README that details the steps to reproduce:

https://github.com/jonsagara/CSharpWebAppWithFSharpModel

Exceptions (if any)

No response

.NET Version

7.0.100-rc.2.22477.23

Anything else?

OS: Windows 11 Version 22H2 (OS Build 22621.755)
Visual Studio 2022: Version 17.4.0 Preview 5.0

dotnet --info

.NET SDK:
 Version:   7.0.100-rc.2.22477.23
 Commit:    0a5360315a

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.22621
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\7.0.100-rc.2.22477.23\

Host:
  Version:      7.0.0-rc.2.22472.3
  Architecture: x64
  Commit:       550605cc93

.NET SDKs installed:
  3.1.302 [C:\Program Files\dotnet\sdk]
  3.1.424 [C:\Program Files\dotnet\sdk]
  5.0.203 [C:\Program Files\dotnet\sdk]
  5.0.214 [C:\Program Files\dotnet\sdk]
  5.0.302 [C:\Program Files\dotnet\sdk]
  5.0.303 [C:\Program Files\dotnet\sdk]
  5.0.403 [C:\Program Files\dotnet\sdk]
  5.0.408 [C:\Program Files\dotnet\sdk]
  6.0.100-preview.6.21355.2 [C:\Program Files\dotnet\sdk]
  6.0.202 [C:\Program Files\dotnet\sdk]
  6.0.203 [C:\Program Files\dotnet\sdk]
  6.0.301 [C:\Program Files\dotnet\sdk]
  6.0.305 [C:\Program Files\dotnet\sdk]
  6.0.402 [C:\Program Files\dotnet\sdk]
  7.0.100-rc.1.22431.12 [C:\Program Files\dotnet\sdk]
  7.0.100-rc.2.22477.23 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.26 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.26 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.21 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.25 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.0-preview.6.21355.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.0-rc.1.22427.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.0-rc.2.22476.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.21 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.25 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.0-preview.6.21352.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.0-rc.1.22426.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.0-rc.2.22472.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.19 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.21 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.25 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.0-preview.6.21353.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.0-rc.1.22427.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.0-rc.2.22472.13 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  arm64 [C:\Program Files\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\arm64\InstallLocation]
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  C:\Dev\SANDBOX\CSharpWebAppWithFSharpModel\global.json

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

The text was updated successfully, but these errors were encountered:

jonsagara · 2022-10-26T18:27:38Z

I'm not sure if this is the proper repository for this issue. If not, will you please give me a pointer to the correct one? Thanks!

danroth27 · 2022-10-27T17:02:01Z

@jaredpar This looks like it may be a compiler issue? I'm able to reproduce this with just a normal debug build. It looks like the Term property is present, so I'm not sure why the compiler is complaining.

jaredpar · 2022-10-27T17:05:55Z

@danroth27 at a glance I'd say it's a dupe of dotnet/fsharp#14088

@KevinRansom @vzarytovskii to confirm

vzarytovskii · 2022-10-27T17:28:58Z

@danroth27 at a glance I'd say it's a dupe of dotnet/fsharp#14088

@KevinRansom @vzarytovskii to confirm

The issue was related to the reference assemblies.

I will move this one to the F# repo and take a look at it.

Update: on a second thought - looks like the same issue.

The fix to was pushed and inserted into .NET7.

jonsagara · 2022-10-27T17:36:08Z

Thanks for response!

I can confirm that the suggested workaround resolved the issue for me.

The fix to was pushed and inserted into .NET7.

Does that mean the fix will be available in .NET7 RTM next month?

vzarytovskii · 2022-10-27T17:47:48Z

Does that mean the fix will be available in .NET7 RTM next month?

Yep

jonsagara · 2022-10-27T17:50:37Z

Great. Thank you!

mkArtakMSFT added the area-mvc Includes: MVC, Actions and Controllers, Localization, CORS, most templates label Oct 26, 2022

jonsagara closed this as completed Oct 27, 2022

ghost locked as resolved and limited conversation to collaborators Nov 26, 2022

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.NET 7.0 RC2 breaks MVC build where a view references an F# model #44749

.NET 7.0 RC2 breaks MVC build where a view references an F# model #44749

jonsagara commented Oct 26, 2022 •

edited

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jonsagara commented Oct 26, 2022

danroth27 commented Oct 27, 2022

jaredpar commented Oct 27, 2022 •

edited

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vzarytovskii commented Oct 27, 2022 •

edited

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jonsagara commented Oct 27, 2022

vzarytovskii commented Oct 27, 2022

jonsagara commented Oct 27, 2022

.NET 7.0 RC2 breaks MVC build where a view references an F# model #44749

.NET 7.0 RC2 breaks MVC build where a view references an F# model #44749

Comments

jonsagara commented Oct 26, 2022 • edited Loading

Is there an existing issue for this?

Describe the bug

Expected Behavior

Steps To Reproduce

Exceptions (if any)

.NET Version

Anything else?

jonsagara commented Oct 26, 2022

danroth27 commented Oct 27, 2022

jaredpar commented Oct 27, 2022 • edited Loading

vzarytovskii commented Oct 27, 2022 • edited Loading

jonsagara commented Oct 27, 2022

vzarytovskii commented Oct 27, 2022

jonsagara commented Oct 27, 2022

jonsagara commented Oct 26, 2022 •

edited

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jaredpar commented Oct 27, 2022 •

edited

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vzarytovskii commented Oct 27, 2022 •

edited

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