ruby/rubygems · error · PluginInstallError

Failed to install plugin `#{spec.name}`, due to #{e.class} (

Error message

Failed to install plugin `#{spec.name}`, due to #{e.class} (#{e.message})

What it means

Error "Failed to install plugin `#{spec.name}`, due to #{e.class} (#{e.message})" thrown in ruby/rubygems.

Source

Thrown at lib/bundler/plugin.rb:325

      raise MalformattedPlugin, "#{PLUGIN_FILE_NAME} was not found in the plugin." unless plugin_file.file?
    end

    # Validates and registers a plugin.
    #
    # @param [String] name the name of the plugin
    # @param [Specification] spec of installed plugin
    # @param [Boolean] optional_plugin, removed if there is conflict with any
    #                     other plugin (used for default source plugins)
    #
    # @raise [PluginInstallError] if validation or registration raises any error
    def save_plugin(name, spec, optional_plugin = false)
      return if index.up_to_date?(spec)

      validate_plugin! Pathname.new(spec.full_gem_path)
      installed = register_plugin(name, spec, optional_plugin)
      Bundler.ui.info "Installed plugin #{name}" if installed
    rescue PluginError => e
      raise PluginInstallError, "Failed to install plugin `#{spec.name}`, due to #{e.class} (#{e.message})"
    end

    # Runs the plugins.rb file in an isolated namespace, records the plugin
    # actions it registers for and then passes the data to index to be stored.
    #
    # @param [String] name the name of the plugin
    # @param [Specification] spec of installed plugin
    # @param [Boolean] optional_plugin, removed if there is conflict with any
    #                     other plugin (used for default source plugins)
    #
    # @raise [MalformattedPlugin] if plugins.rb raises any error
    def register_plugin(name, spec, optional_plugin = false)
      commands = @commands
      sources = @sources
      hooks = @hooks_by_event

      @commands = {}
      @sources = {}

View on GitHub (pinned to 86cbb817a3)

When it happens

Trigger: Thrown at lib/bundler/plugin.rb:325 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/d7a99a3350f02938. Report an issue: GitHub.