[DRE-maint] Bug#1027407: ruby-rubygems: kernel_require.rb LoadError breaks dhelp

[Drew Parsons]

Package: ruby-rubygems
Version: 3.3.15-1
Severity: important

/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb from
ruby-rubygems causes a LoadError which prevents dhelp from updating
succcessfully (when packages register a doc-base entry).

This affects all other packages (unrelated to ruby) registering with
doc-base, hence marking Severity: important

The error message (when installing any packing using doc-base, in this
case python-lmfit-doc) is

Setting up python-lmfit-doc (1.1.0-1) ...
Processing triggers for doc-base (0.11.1) ...
Processing 1 added doc-base file...
Registering documents with dhelp...
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- dbm (LoadError)
	from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from /usr/lib/ruby/vendor_ruby/dhelp.rb:21:in `<top (required)>'
	from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
	from /usr/sbin/dhelp_parse:32:in `<main>'


-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
merged-usr: no
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.0.0-6-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages ruby-rubygems depends on:
ii  ruby  1:3.1

ruby-rubygems recommends no packages.

ruby-rubygems suggests no packages.

-- no debconf information