Error on .net9 rc2, Ubuntu 22

[felixf4xu]

Hi,

I'm testing blazorwasm in Ubuntu 22, with commands as below:

dotnet new blazorwasm -o WasmApp
cd WasmApp/
dotnet add package BlazorWasmPreRendering.Build
dotnet publish

then I have this error:

WasmApp failed with 1 error(s) (11.1s) → bin/Release/net9.0/publish/
/home/cc/.nuget/packages/blazorwasmprerendering.build/4.0.1/build/BlazorWasmPreRendering.Build.targets(64,5): error MSB3073: The command ""/home/cc/dotnet/dotnet" "/home/cc/.nuget/packages/blazorwasmprerendering.build/4.0.1/build/../tools//BlazorWasmPreRendering.Build.dll" --assemblyname "WasmApp" -t "WasmApp.App" --selectorofrootcomponent "#app,app" --selectorofheadoutletcomponent "head::after" -p "/home/cc/testcode/WasmApp/bin/Release/net9.0/publish" -i "/home/cc/testcode/WasmApp/obj/Release/net9.0/." --assemblydir "/home/cc/testcode/WasmApp/bin/Release/net9.0" -m "" -f "" --serviceworkerassetsmanifest "" --environment "Prerendering" --emulateauthme "true" --locale "en" -o "IndexHtmlInSubFolders" -u "" -r "Static" --serverport "5050-5999" --bwapoptionsdllext "bin"" exited with code 1.

[jsakamoto]

Hi @felixf4xu,

Could you try to use the version 5.0 preview 2? You can update your project by following the command:

dotnet add package BlazorWasmPreRendering.Build --version 5.0.0-preview.2

Since the .NET 9 SDK has not been officially released yet, I've kept the latest version of the "BlazorWasmPreRendering" package as a preview release.

[axiom-nz]

I'm getting this same error on a standalone WASM project on .net 9. I'm running the latest release of this package.

/Users/user/.nuget/packages/blazorwasmprerendering.build/5.0.0/build/BlazorWasmPreRendering.Build.targets(65,5): error MSB3073: 
The command ""/usr/local/share/dotnet/dotnet" "/Users/user/.nuget/packages/blazorwasmprerendering.build/5.0.0/build/../tools/net9.0/BlazorWasmPreRendering.Build.dll" 
    --assemblyname "Portal.WASM" -t "Portal.WASM.App" --selectorofrootcomponent "#app,app" 
    --selectorofheadoutletcomponent "head::after" -p "/Users/user/Projects/Blazor/Portal.WASM/bin/Release/net9.0/publish" 
    -i "/Users/user/Projects/Blazor/Portal.WASM/obj/Release/net9.0/." --assemblydir "/Users/user/Projects/Blazor/Portal.WASM/bin/Release/net9.0" 
    -m "" -f "net9.0" --serviceworkerassetsmanifest "service-worker-assets.js" --environment "Prerendering" 
    --emulateauthme "true" --locale "en" -o "IndexHtmlInSubFolders"  -u "" -r "Static" --serverport "5050-5999" --bwapoptionsdllext "bin"" 
exited with code 1.

[jsakamoto]

@axiom-nz Could you show me the entire of your build log? The root causing error message must be there.

[axiom-nz]

This is the full build log.

❯ dotnet publish
Restore complete (0.4s)
  Models succeeded with 3 warning(s) (0.1s) → Models/bin/Release/net9.0/publish/
    /Users/user/Projects/Blazor/Models/Internal/StoreDetails/Store.cs(5,19): warning CS8618: Non-nullable property 'Name' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.
    /Users/user/Projects/Blazor/Models/Internal/StoreDetails/Store.cs(6,19): warning CS8618: Non-nullable property 'WebsiteUrl' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.
    /Users/user/Projects/Blazor/Models/Internal/StoreDetails/Store.cs(7,19): warning CS8618: Non-nullable property 'ApiUrl' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.
  Services succeeded with 1 warning(s) (0.3s) → Services/bin/Release/net9.0/publish/
    /Users/user/Projects/Blazor/Services/Provider.cs(51,26): warning CS0168: The variable 'e' is declared but never used
  Portal.WASM failed with 1 error(s) and 4 warning(s) (13.3s) → Portal.WASM/bin/Release/net9.0/publish/
    /Users/user/Projects/Blazor/Portal.WASM/Layout/MainLayout.razor(45,23): warning CS8601: Possible null reference assignment.
    /Users/user/Projects/Blazor/Portal.WASM/Pages/StoreSearchResults.razor(16,81): warning CS8602: Dereference of a possibly null reference.
    /Users/user/Projects/Blazor/Portal.WASM/Pages/Home.razor(61,55): warning CS8602: Dereference of a possibly null reference.
    /Users/user/Projects/Blazor/Portal.WASM/Pages/Home.razor(62,54): warning CS8602: Dereference of a possibly null reference.
    /Users/user/.nuget/packages/blazorwasmprerendering.build/5.0.0/build/BlazorWasmPreRendering.Build.targets(65,5): error MSB3073: The command ""/usr/local/share/dotnet/dotnet" "/Users/user/.nuget/packages/blazorwasmprerendering.build/5.0.0/build/../tools/net9.0/BlazorWasmPreRendering.Build.dll" --assemblyname "Portal.WASM" -t "Portal.WASM.App" --selectorofrootcomponent "#app,app" --selectorofheadoutletcomponent "head::after" -p "/Users/user/Projects/Blazor/Portal.WASM/bin/Release/net9.0/publish" -i "/Users/user/Projects/Blazor/Portal.WASM/obj/Release/net9.0/." --assemblydir "/Users/user/Projects/Blazor/Portal.WASM/bin/Release/net9.0" -m "" -f "net9.0" --serviceworkerassetsmanifest "service-worker-assets.js" --environment "Prerendering" --emulateauthme "true" --locale "en" -o "IndexHtmlInSubFolders"  -u "" -r "Static" --serverport "5050-5999" --bwapoptionsdllext "bin"" exited with code 1.

[jsakamoto]

@axiom-nz Hum... it is not usual. Could you share your project with me? I have to investigate why the build error happens on my side.

[axiom-nz]

Sorry I'm unable to share the repo. I kicked off a build with the BlazorWasmPrerenderingKeepServer flag set to true and hit localhost:5050. With this stacktrace the issue became pretty clear. I wrapped the SessionStorage code in OnInitializedAsync in a try-catch and reran the publish. It worked as expected! Thanks for the prompt response @jsakamoto.

I'll have a play around with moving this to OnAfterRenderAsync, though if that results in a flicker for users I might just leave it as is.

I'm assuming an exception is bubbling up for @felixf4xu as well.

System.InvalidOperationException: IJSInProcessRuntime not available
   at Blazored.SessionStorage.BrowserStorageProvider.CheckForInProcessRuntime()
   at Blazored.SessionStorage.BrowserStorageProvider.ContainKey(String key)
   at Blazored.SessionStorage.SessionStorageService.ContainKey(String key)
   at Portal.WASM.Pages.Home.OnInitializedAsync()
   at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

[jsakamoto]

Hi @felixf4xu,
As you probably know, the BlazorWasmPreRendering.Build package ver.5.0.0 has been released, and it officially supports .NET 9 SDK. Have you tried it yet?