• This issue is blocking
• This issue is causing unreasonable pain

The VerifyClosure task is implemented in the Microsoft.DotNet.Build.Tasks.Packaging project which will be marked as deprecated or deleted later this year. Both dotnet/runtime's package testing system and the Shared Framework SDK depends on the task so it should be considered to be moved into Microsoft.DotNet.PackageTesting. Both consumers could then take a direct dependency on that package instead.

cc @Anipik @ericstj @jkoritzinsky