Xamarin.Mac.Sdk bundles reference assemblies instead of real assemblies in the .app

[sandyarmstrong]

1. Use Xamarin.Mac.Sdk/0.17.0.
2. Reference (directly or indirectly) System.Memory or System.Threading.Tasks.Extensions in your app.
3. Build and run.

Expected results

Correct assemblies are bundled; app runs without issue.

Actual results

Reference assemblies from the nupkg are bundled; app may crash if these assemblies ever need to be loaded and used.

I have created a sample at https://github.com/sandyarmstrong/WitnessMe. See its README for details on reproducing, and where my investigations have taken me so far.

[sandyarmstrong]

Explicit References Passed to MMP for Traditional Xamarin.Mac Project

Explicit References Passed to MMP for Xamarin.Mac.Sdk Project

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The zipped-up binlog (might have a few trivial differences from what's in the git sample): msbuild (2).zip