[Bug]: Msbuild drops glob based Item on Unix only

[mmitche]

Issue Description

<NuspecProperty Include="Output=$(PublishDir)**\*" /> in efcore's dotnet-ef.csproj (SetPackageProperties target) yields different results on Windows and Linux. On Windows, this item is passed cleanly through to the Nuspec generation and pack, yielding the correct pack contents. On Linux, the item is dropped entirely.

Escaping the *s with %2A works.

Steps to Reproduce

Build the efcore repo on Windows and Linux and compare the contents of the dotnet-ef package.

Expected Behavior

Actual Behavior

All dotnet-ef* files are missing.

Analysis

No response

Versions & Configurations

8.0.1xx SDK and 9.0.1xx SDKs exhibit the behavior.

[rainersigwald]

I suspect that on Windows we're hitting some I/O error and it's falling back to "must be a string literal instead" (#406) but I don't understand why (we checked offline for MAX_PATH) and I don't understand how it's evaluating to nothing on Linux. We need to debug the execution I think.