Creating a new Blazor Web App NET8 RC2 with WebAssembly Interactivity creates broken Error.razor page in Client project

[martinfletcher]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Create a new Blazor Web App with WebAssembly Interactivity:

A Server and Client project is created, but the Client project fails to build due to requiring a HttpContext instance which is not available in the Client project:

Expected Behavior

Able to run newly created project without compile errors.

Steps To Reproduce

Repo with code example: https://github.com/martinfletcher/BlazorWebAppNET8WebAssemblyIssue

Exceptions (if any)

.NET Version

8.0.100-rc.2.23502.2

Anything else?

.NET SDK:
Version: 8.0.100-rc.2.23502.2
Commit: 0abacfc2b6

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22621
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.100-rc.2.23502.2\

.NET workloads installed:
[maui-windows]
Installation Source: VS 17.7.34202.233, VS 17.8.34205.153
Manifest Version: 8.0.0-rc.2.9373/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.maui\8.0.0-rc.2.9373\WorkloadManifest.json
Install Type: Msi

[maui-maccatalyst]
Installation Source: VS 17.7.34202.233
Manifest Version: 8.0.0-rc.2.9373/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.maui\8.0.0-rc.2.9373\WorkloadManifest.json
Install Type: Msi

[maccatalyst]
Installation Source: VS 17.7.34202.233, VS 17.8.34205.153
Manifest Version: 16.4.8968-net8-rc2/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.maccatalyst\16.4.8968-net8-rc2\WorkloadManifest.json
Install Type: Msi

[maui-ios]
Installation Source: VS 17.7.34202.233
Manifest Version: 8.0.0-rc.2.9373/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.maui\8.0.0-rc.2.9373\WorkloadManifest.json
Install Type: Msi

[ios]
Installation Source: VS 17.7.34202.233, VS 17.8.34205.153
Manifest Version: 16.4.8968-net8-rc2/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.ios\16.4.8968-net8-rc2\WorkloadManifest.json
Install Type: Msi

[android]
Installation Source: VS 17.7.34202.233, VS 17.8.34205.153
Manifest Version: 34.0.0-rc.2.468/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.android\34.0.0-rc.2.468\WorkloadManifest.json
Install Type: Msi

[maui-android]
Installation Source: VS 17.7.34202.233
Manifest Version: 8.0.0-rc.2.9373/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.sdk.maui\8.0.0-rc.2.9373\WorkloadManifest.json
Install Type: Msi

[wasm-tools]
Installation Source: VS 17.7.34202.233
Manifest Version: 8.0.0-rc.2.23479.6/8.0.100-rc.2
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100-rc.2\microsoft.net.workload.mono.toolchain.current\8.0.0-rc.2.23479.6\WorkloadManifest.json
Install Type: Msi

Host:
Version: 8.0.0-rc.2.23479.6
Architecture: x64
Commit: 0b25e38ad3

.NET SDKs installed:
3.1.424 [C:\Program Files\dotnet\sdk]
6.0.305 [C:\Program Files\dotnet\sdk]
7.0.402 [C:\Program Files\dotnet\sdk]
8.0.100-rc.2.23502.2 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 3.1.30 [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 6.0.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.0-rc.2.23480.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.30 [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 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.23 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.0-rc.2.23479.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.30 [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 6.0.23 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.0-rc.2.23479.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

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

Environment variables:
Not set

global.json file:
Not found

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https://aka.ms/dotnet/download

[augustevn]

Has been discussed in .NET 8 RC2 Blazor standup. Solution, move Error.razor to server project's /Components folder.

[MisinformedDNA]

Duplicate: #50980