Build fails for Elmish.WPF

[rolfsuter]

High-level description
Build fails for Elmish.WPF with error FS3560: This copy-and-update record expression changes all fields of record type

Steps to Reproduce
Build for .NET8

Expected or desired behavior
Building the project should work.

Actual behavior

Build started at 07:25...
1>------ Build started: Project: Elmish.WPF, Configuration: Release Any CPU ------
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(463,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.OneWayData<_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(463,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.OneWayData<_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(481,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.OneWayToSourceData<_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(481,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.OneWayToSourceData<_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(544,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.TwoWayData<_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(544,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.TwoWayData<_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(647,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelData<_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(647,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelData<_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(760,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelSeqUnkeyedData<_,_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(760,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelSeqUnkeyedData<_,_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(824,9): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelSeqKeyedData<_,_,_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(824,9): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelSeqKeyedData<_,_,_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(463,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.OneWayData<_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(481,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.OneWayToSourceData<_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(544,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.TwoWayData<_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(647,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelData<_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(760,7): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelSeqUnkeyedData<_,_,_,_,_,_>'. Consider using the record construction syntax instead.
1>C:\Users\Rolf\Source\Repos\elmish\Elmish.WPF\src\Elmish.WPF\BindingData.fs(824,9): error FS3560: This copy-and-update record expression changes all fields of record type 'Elmish.WPF.BindingData.SubModelSeqKeyedData<_,_,_,_,_,_,_>'. Consider using the record construction syntax instead.
1>Done building project "Elmish.WPF.fsproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
========== Build completed at 07:25 and took 03.545 seconds ==========

Proposal

• Replace the copy-and-update record expression with a record construction syntax. Should I prepare a pull request?
• Prevent error message. How?

Additional Information
Elmish.WPF version: 4.0.0-beta-54
Target framework version: net8.0-window

[TysonMN]

Our latest CI build passed, so I expect the problem is related to your build environment.

[marner2]

@rolfsuter I think it has to do with certain early versions of .NET 8. The latest versions of .NET 8 do not warn on this. Can you confirm that updating your installation of Visual Studio fixes the issue?

[rolfsuter]

@marner2, @TysonMN
Today, I was not able to reproduce the issue and I could successfully build the project without first updating Visual Studio. I have now update the .NET SDK and Visual Studio and everything works fine. Thank you for your help and sorry for bothering you. I close the issue.

[rolfsuter]

closed