Unable to build project using VS 17.12.3: “DiscoverPrecompressedAssets” task failed unexpectedly

[fltrierweiler]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I've found a similar issue, but the exception there isn't the same (System.ArgumentException there and System.InvalidOperationException here) and that issue was closed without an answer, so I've decided to create a new one.

Basically, I'm unable to build an existing project that uses Blazor.BrowserExtension.Template. It used to work fine with version 17.11.35219.272.

Expected Behavior

Simply put, the project build should work without errors, as it used to do.

Steps To Reproduce

I've created a minimalistic project to showcase the issue. To reproduce the error, all that has to be done is to build the project.

Exceptions (if any)

Here's the error I get whenever I try to build the project using VS 17.12.3:

The "DiscoverPrecompressedAssets" task failed unexpectedly.
System.InvalidOperationException: Fingerprint for '...\ExtensionTest\ExtensionTest\obj\Debug\net8.0\browserextension\build\BackgroundWorker.js' is not defined.
   at Microsoft.AspNetCore.StaticWebAssets.Tasks.StaticWebAsset.Validate()
   at Microsoft.AspNetCore.StaticWebAssets.Tasks.StaticWebAsset.FromTaskItem(ITaskItem item)
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Microsoft.AspNetCore.StaticWebAssets.Tasks.DiscoverPrecompressedAssets.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()

.NET Version

9.0.101

Anything else?

UPDATE: If I use SDK 8.0.404 and specify the version by adding a global.json to the solution folder, it actually works. Still no way to work with 9.0.101, though.

[MarcoMedrano]

I have the same issue building my maui app, your workaround is working (as I did not update my projects to dotnet 9):

global.json at root directory:

{
  "sdk": {
    "version": "8.0.206"
  }
}