# Buggy code
def run(self):
    super(DocCLI, self).run()

    plugin_type = self.options.type

    # choose plugin type
    if plugin_type == "cache":
        loader = cache_loader
    elif plugin_type == "callback":
        loader = callback_loader
    elif plugin_type == "connection":
        loader = connection_loader
    elif plugin_type == "lookup":
        loader = lookup_loader
    elif plugin_type == "strategy":
        loader = strategy_loader
    elif plugin_type == "vars":
        loader = vars_loader
    elif plugin_type == "inventory":
        loader = PluginLoader(
            "InventoryModule",
            "ansible.plugins.inventory",
            "inventory_plugins",
            "inventory_plugins",
        )
    else:
        loader = module_loader

    # add to plugin path from command line
    if self.options.module_path is not None:
        for i in self.options.module_path.split(os.pathsep):
            loader.add_directory(i)

    # save only top level paths for errors
    search_paths = DocCLI.print_paths(loader)
    loader._paths = None  # reset so we can use subdirs below

    # list plugins for type
    if self.options.list_dir:
        paths = loader._get_paths()
        for path in paths:
            self.find_plugins(path, plugin_type)

        self.pager(self.get_plugin_list_text(loader))
        return 0

    # process all plugins of type
    if self.options.all_plugins:
        paths = loader._get_paths()
        for path in paths:
            self.find_plugins(path, plugin_type)
        self.args = sorted(set(self.plugin_list))

    if len(self.args) == 0:
        raise AnsibleOptionsError("Incorrect options passed")

    # process command line list
    text = ""
    for plugin in self.args:
        try:
            # if the plugin lives in a non-python file (eg, win_X.ps1), require the corresponding python file for docs
            filename = loader.find_plugin(
                plugin, mod_type=".py", ignore_deprecated=True, check_aliases=True
            )
            if filename is None:
                display.warning(
                    "%s %s not found in:\n%s\n" % (plugin_type, plugin, search_paths)
                )
                continue

            if any(filename.endswith(x) for x in C.BLACKLIST_EXTS):
                continue

            try:
                doc, plainexamples, returndocs, metadata = plugin_docs.get_docstring(
                    filename, verbose=(self.options.verbosity > 0)
                )
            except:
                display.vvv(traceback.format_exc())
                display.error(
                    "%s %s has a documentation error formatting or is missing documentation."
                    % (plugin_type, plugin)
                )
                continue

            if doc is not None:
                # assign from other sections
                doc["plainexamples"] = plainexamples
                doc["returndocs"] = returndocs
                doc["metadata"] = metadata

                # generate extra data
                if plugin_type == "module":
                    # is there corresponding action plugin?
                    if plugin in action_loader:
                        doc["action"] = True
                    else:
                        doc["action"] = False
                doc["filename"] = filename
                doc["now_date"] = datetime.date.today().strftime("%Y-%m-%d")
                if "docuri" in doc:
                    doc["docuri"] = doc[plugin_type].replace("_", "-")

                if self.options.show_snippet and plugin_type == "module":
                    text += self.get_snippet_text(doc)
                else:
                    text += self.get_man_text(doc)
            else:
                # this typically means we couldn't even parse the docstring, not just that the YAML is busted,
                # probably a quoting issue.
                raise AnsibleError("Parsing produced an empty object.")
        except Exception as e:
            display.vvv(traceback.format_exc())
            raise AnsibleError(
                "%s %s missing documentation (or could not parse documentation): %s\n"
                % (plugin_type, plugin, str(e))
            )

    if text:
        self.pager(text)
    return 0


# Traceback (AttributeError)
ERROR! Unexpected Exception, this is probably a bug: 'list' object has no attribute 'split'
the full traceback was:

Traceback (most recent call last):
File "/home/user/ansible/ansible/bin/ansible-doc", line 109, in <module>
exit_code = cli.run()
File "/home/user/ansible/ansible/lib/ansible/cli/doc.py", line 107, in run
for i in self.options.module_path.split(os.pathsep):
AttributeError: 'list' object has no attribute 'split'

# Fixed code
def run(self):
    super(DocCLI, self).run()

    plugin_type = self.options.type

    # choose plugin type
    if plugin_type == "cache":
        loader = cache_loader
    elif plugin_type == "callback":
        loader = callback_loader
    elif plugin_type == "connection":
        loader = connection_loader
    elif plugin_type == "lookup":
        loader = lookup_loader
    elif plugin_type == "strategy":
        loader = strategy_loader
    elif plugin_type == "vars":
        loader = vars_loader
    elif plugin_type == "inventory":
        loader = PluginLoader(
            "InventoryModule",
            "ansible.plugins.inventory",
            "inventory_plugins",
            "inventory_plugins",
        )
    else:
        loader = module_loader

    # add to plugin path from command line
    if self.options.module_path:
        for path in self.options.module_path:
            if path:
                loader.add_directory(path)

    # save only top level paths for errors
    search_paths = DocCLI.print_paths(loader)
    loader._paths = None  # reset so we can use subdirs below

    # list plugins for type
    if self.options.list_dir:
        paths = loader._get_paths()
        for path in paths:
            self.find_plugins(path, plugin_type)

        self.pager(self.get_plugin_list_text(loader))
        return 0

    # process all plugins of type
    if self.options.all_plugins:
        paths = loader._get_paths()
        for path in paths:
            self.find_plugins(path, plugin_type)
        self.args = sorted(set(self.plugin_list))

    if len(self.args) == 0:
        raise AnsibleOptionsError("Incorrect options passed")

    # process command line list
    text = ""
    for plugin in self.args:
        try:
            # if the plugin lives in a non-python file (eg, win_X.ps1), require the corresponding python file for docs
            filename = loader.find_plugin(
                plugin, mod_type=".py", ignore_deprecated=True, check_aliases=True
            )
            if filename is None:
                display.warning(
                    "%s %s not found in:\n%s\n" % (plugin_type, plugin, search_paths)
                )
                continue

            if any(filename.endswith(x) for x in C.BLACKLIST_EXTS):
                continue

            try:
                doc, plainexamples, returndocs, metadata = plugin_docs.get_docstring(
                    filename, verbose=(self.options.verbosity > 0)
                )
            except:
                display.vvv(traceback.format_exc())
                display.error(
                    "%s %s has a documentation error formatting or is missing documentation."
                    % (plugin_type, plugin)
                )
                continue

            if doc is not None:
                # assign from other sections
                doc["plainexamples"] = plainexamples
                doc["returndocs"] = returndocs
                doc["metadata"] = metadata

                # generate extra data
                if plugin_type == "module":
                    # is there corresponding action plugin?
                    if plugin in action_loader:
                        doc["action"] = True
                    else:
                        doc["action"] = False
                doc["filename"] = filename
                doc["now_date"] = datetime.date.today().strftime("%Y-%m-%d")
                if "docuri" in doc:
                    doc["docuri"] = doc[plugin_type].replace("_", "-")

                if self.options.show_snippet and plugin_type == "module":
                    text += self.get_snippet_text(doc)
                else:
                    text += self.get_man_text(doc)
            else:
                # this typically means we couldn't even parse the docstring, not just that the YAML is busted,
                # probably a quoting issue.
                raise AnsibleError("Parsing produced an empty object.")
        except Exception as e:
            display.vvv(traceback.format_exc())
            raise AnsibleError(
                "%s %s missing documentation (or could not parse documentation): %s\n"
                % (plugin_type, plugin, str(e))
            )

    if text:
        self.pager(text)
    return 0