ruby/rubygems · error · Gem::Exception

Unable to download '#{spec.full_name}'

Error message

Unable to download '#{spec.full_name}'

What it means

Error "Unable to download '#{spec.full_name}'" thrown in ruby/rubygems.

Source

Thrown at lib/rubygems/source/specific_file.rb:41

  end

  ##
  # The Gem::Specification extracted from this .gem.

  attr_reader :spec

  def load_specs(*a) # :nodoc:
    [@name]
  end

  def fetch_spec(name) # :nodoc:
    return @spec if name == @name
    raise Gem::Exception, "Unable to find '#{name}'"
  end

  def download(spec, dir = nil) # :nodoc:
    return @path if spec == @spec
    raise Gem::Exception, "Unable to download '#{spec.full_name}'"
  end

  def pretty_print(q) # :nodoc:
    q.object_group(self) do
      q.group 2, "[SpecificFile:", "]" do
        q.breakable
        q.text @path
      end
    end
  end

  ##
  # Orders this source against +other+.
  #
  # If +other+ is a SpecificFile from a different gem name +nil+ is returned.
  #
  # If +other+ is a SpecificFile from the same gem name the versions are
  # compared using Gem::Version#<=>

View on GitHub (pinned to 86cbb817a3)

Solutions

1. Check network/source availability and retry the download
2. Verify the gem version exists on the configured source

When it happens

Trigger: Thrown at lib/rubygems/source/specific_file.rb:41 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruby/rubygems@86cbb817a3 (2026-08-23). Data as JSON: /api/errors/08678f471de29d7f. Report an issue: GitHub.