Unsupported Platform target x86 in version 17.7.0? about vstest HOT 11 CLOSED

Found it. We have been doing full rewrite of how we package the app in 17.7.0 to build via the common build system Arcade, and the testhost we shipped in testhost.x86 is running as x64. I can see it fail in the same callstack when loading the dll into a plain x64 .net 7 console app. Surprisingly this error message is not mentioning anything about wrong image format, which is unexpected to me.

dumpbin /headers S:\t\xunit13\bin\Debug\net7.0\testhost.x86.exe
Microsoft (R) COFF/PE Dumper Version 14.38.32919.0
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file S:\t\xunit13\bin\Debug\net7.0\testhost.x86.exe

PE signature found

File Type: EXECUTABLE IMAGE

FILE HEADER VALUES
            8664 machine (x64)
               7 number of sections
        63747414 time date stamp Wed Nov 16 06:24:36 2022
               0 file pointer to symbol table
               0 number of symbols
              F0 size of optional header
              22 characteristics
                   Executable
                   Application can handle large (>2GB) addresses

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Fixes are building, if tests pass I will backport to 17.7.x and we should release patch on Tuesday.

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Can you really reproduce this with xunit? Because I can't

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Thanks for the info, will try it.

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Can you really reproduce this with xunit? Because I can't

Yes, I can still reproduce with an xUnit project.

I don't see it, do you have more output in that console?

<!-- file mstest78.csproj -->
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <IsPackable>false</IsPackable>
    <IsTestProject>true</IsTestProject>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.0" />
    <PackageReference Include="MSTest.TestAdapter" Version="2.2.10" />
    <PackageReference Include="MSTest.TestFramework" Version="2.2.10" />
    <PackageReference Include="coverlet.collector" Version="3.2.0" />
  </ItemGroup>

</Project>

As far as I can see, <PlatformTarget>x86</PlatformTarget> is missing in the .csproj to reproduce the behaviour.

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vstest.console S:\t\mstest77\bin\x86\Debug\net7.0\mstest77.dll --diag:logs
Microsoft (R) Test Execution Command Line Tool Version 17.6.2-release-20230615-01 (x64)
Copyright (c) Microsoft Corporation. All rights reserved.

Starting test execution, please wait...
Logging Vstest Diagnostics in file: S:\t\mstest77\logs\vstest.console_57264.diag
A total of 1 test files matched the specified pattern.
[MSTest][Discovery][S:\t\mstest77\bin\x86\Debug\net7.0\mstest77.dll] Failed to discover tests from assembly S:\t\mstest77\bin\x86\Debug\net7.0\mstest77.dll. Reason:Could not load file or assembly 'mstest77, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.
No test is available in S:\t\mstest77\bin\x86\Debug\net7.0\mstest77.dll. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.

Additionally, path to test adapters can be specified using /TestAdapterPath command. Example /TestAdapterPath:.

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I am having this issue in CI builds, using the MS hosted agents.

It's a multi-targeted NUnit project that also targets netcoreapp3.1.

I have installed the netcoreapp3.1 runtime in x86 using the dotnet-install script and run the test using

dotnet test Project -- RunConfiguration.TargetPlatform=x86

I end up with a You must install or update .NET to run this application error message. Same for x64 works fine.

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@smkanadl are you hitting this with just 17.7.0 or 17.6.3 as well? Because needing x86 runtime is a normal behavior of a .NET application that is built via any SDK (no matter if x64, x86 or arm64), and x86 runtime is not installed by default IIRC. You can check "C:\Program Files (x86)\dotnet\dotnet.exe" --info, and see if you have the runtime listed in your list of x86 runtimes.

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@nohwnd I am hitting this with 17.7.0 only. My pipeline was working fine with 17.6.1 before. When I upgraded to 17.7.0 it stopped working. Going back to 17.6.3 fix the problems.

The matching x86 runtime was always installed. I also tried to install the full x86 SDK to get 17.7.0 working, but that didn't help either.

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I don't see it, do you have more output in that console?

How I do it:

dotnet test -- RunConfiguration.TargetPlatform=x86
  Determining projects to restore...
  All projects are up-to-date for restore.
  mstest78 -> S:\t\mstest78\bin\Debug\net7.0\mstest78.dll
Test run for S:\t\mstest78\bin\Debug\net7.0\mstest78.dll (.NETCoreApp,Version=v7.0)
Microsoft (R) Test Execution Command Line Tool Version 17.7.0-preview-23364-03+bc17bb9693cfc4778ded51aa0ab7f1065433f989 (x64)
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.

Passed!  - Failed:     0, Passed:     1, Skipped:     0, Total:     1, Duration: 15 ms - mstest78.dll (net7.0)

<!-- file mstest78.csproj -->
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <IsPackable>false</IsPackable>
    <IsTestProject>true</IsTestProject>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.0" />
    <PackageReference Include="MSTest.TestAdapter" Version="2.2.10" />
    <PackageReference Include="MSTest.TestFramework" Version="2.2.10" />
    <PackageReference Include="coverlet.collector" Version="3.2.0" />
  </ItemGroup>

</Project>

S:\t\mstest78> dotnet --version
7.0.400

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Fixed in 17.7.1 that is now released and we will be inserting into net7 and next servicing of VS.

cc @cvpoienaru

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