[DRE-maint] Bug#892324: ruby-buff-config: FTBFS and Debci failure with ruby-hashie 3.5.5-2

[Adrian Bunk]

Source: ruby-buff-config
Version: 2.0.0-1
Severity: serious

https://ci.debian.net/packages/r/ruby-buff-config/unstable/amd64/
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ruby-buff-config.html

...

Failures:

  1) Buff::Config::Ruby#to_rb returns ruby with key values for each attribute
     Failure/Error: expect(lines[3]).to eq('cookbook_path(["cookbooks"])')

       expected: "cookbook_path([\"cookbooks\"])"
            got: "cookbook_path(#<Hashie::Array [\"cookbooks\"]>)"

       (compared using ==)
     # ./spec/buff/config/ruby_spec.rb:90:in `block (3 levels) in <top (required)>'

Finished in 0.85024 seconds (files took 3.89 seconds to load)
30 examples, 1 failure

Failed examples:

rspec ./spec/buff/config/ruby_spec.rb:79 # Buff::Config::Ruby#to_rb returns ruby with key values for each attribute

/usr/bin/ruby2.5 /usr/bin/rspec --pattern ./spec/\*\*/\*_spec.rb --format documentation failed
ERROR: Test "ruby2.5" failed. Exiting.
dh_auto_install: dh_ruby --install /build/1st/ruby-buff-config-2.0.0/debian/ruby-buff-config returned exit code 1
make: *** [debian/rules:6: binary] Error 1