goreleaser: packagecloud.io http 500 error on RPMs built with v0.120.x

Describe the bug

Since the new RPM code in nfpm and goreleaser 0.120.x was introduced it is no longer possible to push RPMs to packagecloud.io.

Packagecloud support response:

This package is missing a lot of required RPM headers that must appear in the YUM metadata so that YUM can find this package and install it from a repository.

I would suggest that the maintainer of this package spend some time reviewing the RPM documentation and/or requesting the tool they use for generating the RPM automatically all required RPM headers. There’s lots of possible malformed RPM packages that will make our system 500; we catch a lot of the cases, but we do miss a few and will still 500 in some rare, isolated cases (like this package, which is significantly malformed).

To Reproduce

Steps to reproduce the behavior:

It should be possible to reproduce this bug locally from the https://github.com/pantheon-systems/pauditd project:

git clone git@github.com:pantheon-systems/pauditd.git
cd pauditd

curl -sL https://git.io/goreleaser | bash -s -- --snapshot --rm-dist

push to an existing packagecloud.io repo:

$ package_cloud push xxx/xxx/el/8 dist/*rpm

Looking for repository at xxx/xxx... success!
Pushing dist/pauditd-v1.1.11-next-1572710235-x86_64.rpm... Traceback (most recent call last):
        23: from /usr/local/bin/package_cloud:22:in `<main>'
        22: from /usr/local/bin/package_cloud:22:in `load'
        21: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/bin/package_cloud:4:in `<top (required)>'
        20: from /usr/local/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/base.rb:466:in `start'
        19: from /usr/local/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
        18: from /usr/local/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
        17: from /usr/local/lib/ruby/gems/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
        16: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/cli/entry.rb:108:in `push'
        15: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/benchmark.rb:293:in `measure'
        14: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/cli/entry.rb:168:in `block in push'
        13: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/cli/entry.rb:168:in `each'
        12: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/cli/entry.rb:178:in `block (2 levels) in push'
        11: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/benchmark.rb:293:in `measure'
        10: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/cli/entry.rb:182:in `block (3 levels) in push'
         9: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/cli/entry.rb:242:in `create_package'
         8: from /usr/local/lib/ruby/gems/2.6.0/gems/package_cloud-0.3.05/lib/package_cloud/repository.rb:52:in `create_package'
         7: from /usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/request.rb:52:in `execute'
         6: from /usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/request.rb:145:in `execute'
         5: from /usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/request.rb:715:in `transmit'
         4: from /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/net/http.rb:920:in `start'
         3: from /usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/request.rb:725:in `block in transmit'
         2: from /usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/request.rb:809:in `process_result'
         1: from /usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/abstract_response.rb:103:in `return!'
/usr/local/lib/ruby/gems/2.6.0/gems/rest-client-2.0.2/lib/restclient/abstract_response.rb:223:in `exception_with_response': 500 Internal Server Error (RestClient::InternalServerError)

Additional context

Workaround is to use goreleaser v0.119.3, the last release before the nfpm rpm refactor.

Apologies I cannot provide more details at this time. If I am able to determine anything helpful I’ll update this thread.