Preview package publishing broken

[Piedone]

Describe the bug

Currently, publishing the preview NuGet packages is broken. Started here after merging this PR. The "error: File does not exist (true)." error message is not exactly helpful.

To Reproduce

This happens on every build since then. Re-running the jobs doesn't help. Seemingly, everything is built fine up until then, and actually all packages are pushed despite the build failing.

Expected behavior

It works :|.

[Piedone]

I'm investigating this. While this started with the linked PR, I have no idea why any of the changes there, which are really simple, would case this.

[Piedone]

Locally on Windows I get "error: File does not exist (./src/**/*.nupkg)." for dotnet nuget push './src/**/*.nupkg' -n true -s C:/local/path --skip-duplicate (it should be dotnet nuget push 'src/**/*.nupkg' -n true -s C:/local/path --skip-duplicate). So it dawned on me that "true" in the error is not a boolean but a path. However, I don't see how "true" in this command can be considered a path ,unless the publish key is something really strange and changed just yesterday - but it didn't (checked the secrets).

[Piedone]

.NET changed from 6.0.102 to 6.0.200.

[Piedone]

Tried locally with 6.0.102 and there's no issue (also tried publishing to a Cloudsmith repo). Updated to 6.0.200 and I get the same error, even with local publishing: dotnet nuget push 'src/**/*.nupkg' -n true -s C:\local-path --skip-duplicate.

It's a .NET bug :(. Somebody noticed it just now too: NuGet/Home#11601

[Piedone]

Found a workaround.