UpToDateCheck: always fail if projects.assets.json is updated

Visual Studio Version: 16.5.5

Summary:

Steps to Reproduce:

1. Create .NET Standard project

2. Build twice (UpToDateCheck should work on second build)

3. Touch obj\projects.assets.json (in practice, it happens to me once in a while when VS restore solution)

4. Build once: UpToDateCheck fails (expected) and trigger build However output files are not being touched because CoreCompile is skipped (Inputs don’t contain obj\projects.assets.json, only .cs files)

Expected Behavior:

1. Build again: UpToDateCheck succeed

Actual Behavior:

1. Build again: UpToDateCheck fails (because output files are still older than obj\projects.assets.json)

User Impact:

UpToDateCheck is broken until a full Rebuild

Workaround

Here’s a MSBuild Target to add this file to CoreCompile inputs:

  <Target Name="_GenerateCompileInputsProjectAssets" AfterTargets="_GenerateCompileInputs">
    <ItemGroup>
      <CustomAdditionalCompileInputs Include="$(ProjectAssetsFile)" />
    </ItemGroup>
  </Target>

[xen2]

@nkolev92 sorry that I didn’t answer at the time. I don’t remember exactly when the problem started.

[drewnoakes]

I just tried the repro steps here and it no longer reproduces in 17.1. We have made several changes to the fast up-to-date check since this issue was filed, and looking at the code I do not expect this issue to exist any more. I expect the fix exists in 16.11 (possibly earlier).

I’ll close this. Let me know if you still experience this issue. Thanks.