Visual Studio issues with building simple console app

[steveharter]

Having issues since recently upgrading to the latest SDK and runtime. When building a simple console app in Visual Studio (Version 16.7.0 Preview 2.0) I get an exception.

However using the basic "dotnet" command line works for building\running. Also, compiling runtime repo source code projects within Visual Studio works fine.

I found that uninstalling the latest SDK ( 5.0.100-preview.7.20318.2) and installing an older version (5.0.100-preview.6.20314.3) works for me.

Severity    Code    Description    Project    File    Line    Suppression State
Error    MSB4018    The "CreateAppHost" task failed unexpectedly.
System.IO.FileLoadException: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. Strong name validation failed. (Exception from HRESULT: 0x8013141A)
File name: 'System.Runtime.CompilerServices.Unsafe, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.Security.SecurityException: Strong name validation failed. (Exception from HRESULT: 0x8013141A)
The Zone of the assembly that failed was:
MyComputer
   at Microsoft.NET.HostModel.AppHost.MachOUtils.RemoveSignature(String filePath)
   at Microsoft.NET.HostModel.AppHost.HostWriter.<>c__DisplayClass2_0.<CreateAppHost>g__RemoveSignatureIfMachO|2()
   at Microsoft.NET.HostModel.RetryUtil.RetryOnIOError(Action func)
   at Microsoft.NET.HostModel.AppHost.HostWriter.CreateAppHost(String appHostSourceFilePath, String appHostDestinationFilePath, String appBinaryFilePath, Boolean windowsGraphicalUserInterface, String assemblyToCopyResorcesFrom)
   at Microsoft.NET.Build.Tasks.CreateAppHost.ExecuteCore()
   at Microsoft.NET.Build.Tasks.TaskBase.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
  -->

Configuration

.NET SDK (reflecting any global.json):
 Version:   5.0.100-preview.7.20318.2
 Commit:    00203a3818

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.18363
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\5.0.100-preview.7.20318.2\

Host (useful for support):
  Version: 5.0.0-preview.7.20317.2
  Commit:  fa7c99d6b2

.NET SDKs installed:
  5.0.100-preview.7.20318.2 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 5.0.0-preview.7.20311.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
 Microsoft.NETCore.App 5.0.0-preview.7.20317.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 5.0.0-preview.7.20311.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

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[hypeartist]

Yep, stumbled upon that issue too. Same build (5.0.100-preview.7.20318.2) and same error. Moreover, after I re-targeted the project to .NET Core 3.1 I still was unable to build (still getting exactly the same error!) util I uninstalled 5.0.100-preview.7.20318.2 - and the project built just fine.

[pr0vieh]

dotnet/sdk#12082

[steveharter]

@Anipik any thoughts on System.Runtime.CompilerServices.Unsafe via:

System.IO.FileLoadException: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. Strong name validation failed. (Exception from HRESULT: 0x8013141A)

[Anipik]

Could be related to we having the preview 6 version in the global.json
https://github.com/dotnet/runtime/blob/master/global.json#L3

@ViktorHofer @safern any thoughts ?

[safern]

Could be related to we having the preview 6 version in the global.json

It seems more like a shared framework/SDK issue in the preview7 version of that SDK where System.Runtime.CompilerServices.Unsafe seems to be missing strong name signature... we should look at the latest SDK with latest dotnet/runtime and see if it is the case and try to scope down the issue.

[ViktorHofer]

From latest:

C:\Users\vihofer\Downloads\dotnet-sdk-5.0.100-preview.7.20319.6-win-x64\shared\Microsoft.NETCore.App\5.0.0-preview.7.20318.2\System.Runtime.CompilerServices.Unsafe.dll does not represent a strongly named assembly