=> Bootstrap dependency digest>=20010302: found digest-20190127
===> Skipping vulnerability checks.
WARNING: No /opt/pkg/pkgdb/pkg-vulnerabilities file found.
WARNING: To fix run: `/opt/pkg/sbin/pkg_admin -K /opt/pkg/pkgdb fetch-pkg-vulnerabilities'.
===> Installing for ruby26-rbpdf-1.20.1
=> Generating pre-install file lists
=> Installing gem into installation root
/opt/pkg/lib/ruby/2.6.0/rdoc/any_method.rb:114:in `is_alias_for': stack level too deep (SystemStackError)
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:134:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	from /opt/pkg/lib/ruby/2.6.0/rdoc/method_attr.rb:135:in `documented?'
	 ... 11891 levels...
	from /opt/pkg/lib/ruby/2.6.0/rubygems/command_manager.rb:178:in `process_args'
	from /opt/pkg/lib/ruby/2.6.0/rubygems/command_manager.rb:148:in `run'
	from /opt/pkg/lib/ruby/2.6.0/rubygems/gem_runner.rb:59:in `run'
	from /opt/pkg/bin/gem26:22:in `<main>'
Successfully installed rbpdf-1.20.1
Parsing documentation for rbpdf-1.20.1
Installing ri documentation for rbpdf-1.20.1
*** Error code 1

Stop.
bmake[1]: stopped in /opt/pkgsrc/print/ruby-rbpdf
*** Error code 1

Stop.
bmake: stopped in /opt/pkgsrc/print/ruby-rbpdf