[DRE-maint] Bug#909661: unicorn won't start: "Could not find rbpdf-font-1.19.0"

[Jörg-Volker Peetz]

Package: ruby-rbpdf
Version: 1.19.5+ds.1-1
Severity: normal

Dear Maintainer(s),

a redmine installation served by unicorn won't start after upgrading
ruby-rbpdf from version 1.19.0-1.
The unicorn log file contains the following messages:

I, [2018-09-26T13:20:54.028668 #6578]  INFO -- : Refreshing Gem list
/usr/lib/ruby/vendor_ruby/bundler/spec_set.rb:88:in `block in materialize':
Could not find rbpdf-font-1.19.0 in any of the sources (Bundler::GemNotFound)
	from /usr/lib/ruby/vendor_ruby/bundler/spec_set.rb:82:in `map!'
	from /usr/lib/ruby/vendor_ruby/bundler/spec_set.rb:82:in `materialize'
	from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:170:in `specs'
	from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:237:in `specs_for'
	from /usr/lib/ruby/vendor_ruby/bundler/definition.rb:226:in `requested_specs'
	from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:108:in `block in
definition_method'
	from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:20:in `setup'
	from /usr/lib/ruby/vendor_ruby/bundler.rb:107:in `setup'
	from /usr/lib/ruby/vendor_ruby/bundler/setup.rb:20:in `<top (required)>'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/share/redmine/config/boot.rb:6:in `<top (required)>'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/share/redmine/config/application.rb:1:in `<top (required)>'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/share/redmine/config/environment.rb:2:in `<top (required)>'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	from config.ru:4:in `block in <main>'
	from /usr/lib/ruby/vendor_ruby/rack/builder.rb:55:in `instance_eval'
	from /usr/lib/ruby/vendor_ruby/rack/builder.rb:55:in `initialize'
	from config.ru:1:in `new'
	from config.ru:1:in `<main>'
	from /usr/lib/ruby/vendor_ruby/unicorn.rb:56:in `eval'
	from /usr/lib/ruby/vendor_ruby/unicorn.rb:56:in `block in builder'
	from /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:795:in `build_app!'
	from /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:139:in `start'
	from /usr/bin/unicorn:126:in `<main>'

Any idea?

Regards,
Jörg.

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (600, 'testing'), (500, 'unstable'), (5, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.18.8 (SMP w/8 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages ruby-rbpdf depends on:
ii  ruby               1:2.5.1
ii  ruby-htmlentities  4.3.3-1
ii  ruby-rbpdf-font    1.19.5+ds.1-1

ruby-rbpdf recommends no packages.

ruby-rbpdf suggests no packages.

-- no debconf information