# Buggy code
def run(self, tmp=None, task_vars=None):
    self._supports_check_mode = True
    self._supports_async = True

    result = super(ActionModule, self).run(tmp, task_vars)
    del tmp  # tmp no longer has any effect

    category_names = self._task.args.get(
        "category_names",
        [
            "CriticalUpdates",
            "SecurityUpdates",
            "UpdateRollups",
        ],
    )
    if isinstance(category_names, AnsibleUnicode):
        category_names = [cat.strip() for cat in category_names.split(",")]

    state = self._task.args.get("state", "installed")
    reboot = self._task.args.get("reboot", False)
    reboot_timeout = self._task.args.get("reboot_timeout", self.DEFAULT_REBOOT_TIMEOUT)
    use_task = boolean(self._task.args.get("use_scheduled_task", False), strict=False)

    if state not in ["installed", "searched"]:
        result["failed"] = True
        result["msg"] = "state must be either installed or searched"
        return result

    try:
        reboot = boolean(reboot)
    except TypeError as exc:
        result["failed"] = True
        result["msg"] = "cannot parse reboot as a boolean: %s" % to_text(exc)
        return result

    if not isinstance(reboot_timeout, int):
        result["failed"] = True
        result["msg"] = "reboot_timeout must be an integer"
        return result

    if reboot and self._task.async_val > 0:
        result["failed"] = True
        result["msg"] = "async is not supported for this task when reboot=yes"
        return result

    # Run the module
    new_module_args = self._task.args.copy()
    new_module_args.pop("reboot", None)
    new_module_args.pop("reboot_timeout", None)
    result = self._run_win_updates(new_module_args, task_vars, use_task)

    # if the module failed to run at all then changed won't be populated
    # so we just return the result as is
    # https://github.com/ansible/ansible/issues/38232
    failed = result.get("failed", False)
    if ("updates" not in result.keys() and self._task.async_val == 0) or failed:
        result["failed"] = True
        return result

    changed = result.get("changed", False)
    updates = result.get("updates", dict())
    filtered_updates = result.get("filtered_updates", dict())
    found_update_count = result.get("found_update_count", 0)
    installed_update_count = result.get("installed_update_count", 0)

    # Handle automatic reboots if the reboot flag is set
    if reboot and state == "installed" and not self._play_context.check_mode:
        previously_errored = False
        while (
            result["installed_update_count"] > 0
            or result["found_update_count"] > 0
            or result["reboot_required"] is True
        ):
            display.vvv(
                "win_updates: check win_updates results for "
                "automatic reboot: %s" % json.dumps(result)
            )

            # check if the module failed, break from the loop if it
            # previously failed and return error to the user
            if result.get("failed", False):
                if previously_errored:
                    break
                previously_errored = True
            else:
                previously_errored = False

            reboot_error = None
            # check if a reboot was required before installing the updates
            if (
                result.get("msg", "") == "A reboot is required before "
                "more updates can be installed"
            ):
                reboot_error = (
                    "reboot was required before more updates can be installed"
                )

            if result.get("reboot_required", False):
                if reboot_error is None:
                    reboot_error = "reboot was required to finalise update install"
                try:
                    changed = True
                    self._reboot_server(task_vars, reboot_timeout, use_task)
                except AnsibleError as exc:
                    result["failed"] = True
                    result["msg"] = "Failed to reboot remote host when %s: %s" % (
                        reboot_error,
                        to_text(exc),
                    )
                    break

            result.pop("msg", None)
            # rerun the win_updates module after the reboot is complete
            result = self._run_win_updates(new_module_args, task_vars, use_task)
            if result.get("failed", False):
                return result

            result_updates = result.get("updates", dict())
            result_filtered_updates = result.get("filtered_updates", dict())
            updates = self._merge_dict(updates, result_updates)
            filtered_updates = self._merge_dict(
                filtered_updates, result_filtered_updates
            )
            found_update_count += result.get("found_update_count", 0)
            installed_update_count += result.get("installed_update_count", 0)
            if result["changed"]:
                changed = True

    # finally create the return dict based on the aggregated execution
    # values if we are not in async
    if self._task.async_val == 0:
        result["changed"] = changed
        result["updates"] = updates
        result["filtered_updates"] = filtered_updates
        result["found_update_count"] = found_update_count
        result["installed_update_count"] = installed_update_count

    return result


# Traceback (KeyError)
Traceback (most recent call last):
File "/root/ansible/lib/ansible/executor/task_executor.py", line 138, in run
res = self._execute()
File "/root/ansible/lib/ansible/executor/task_executor.py", line 570, in _execute
result = self._handler.run(task_vars=variables)
File "/root/ansible/lib/ansible/plugins/action/win_updates.py", line 192, in run
if result['failed']:
KeyError: 'failed'

# Fixed code
def run(self, tmp=None, task_vars=None):
    self._supports_check_mode = True
    self._supports_async = True

    result = super(ActionModule, self).run(tmp, task_vars)
    del tmp  # tmp no longer has any effect

    state = self._task.args.get("state", "installed")
    reboot = self._task.args.get("reboot", False)
    reboot_timeout = self._task.args.get("reboot_timeout", self.DEFAULT_REBOOT_TIMEOUT)
    use_task = boolean(self._task.args.get("use_scheduled_task", False), strict=False)

    if state not in ["installed", "searched"]:
        result["failed"] = True
        result["msg"] = "state must be either installed or searched"
        return result

    try:
        reboot = boolean(reboot)
    except TypeError as exc:
        result["failed"] = True
        result["msg"] = "cannot parse reboot as a boolean: %s" % to_text(exc)
        return result

    if not isinstance(reboot_timeout, int):
        result["failed"] = True
        result["msg"] = "reboot_timeout must be an integer"
        return result

    if reboot and self._task.async_val > 0:
        result["failed"] = True
        result["msg"] = "async is not supported for this task when reboot=yes"
        return result

    # Run the module
    new_module_args = self._task.args.copy()
    new_module_args.pop("reboot", None)
    new_module_args.pop("reboot_timeout", None)
    result = self._run_win_updates(new_module_args, task_vars, use_task)

    # if the module failed to run at all then changed won't be populated
    # so we just return the result as is
    # https://github.com/ansible/ansible/issues/38232
    failed = result.get("failed", False)
    if ("updates" not in result.keys() and self._task.async_val == 0) or failed:
        result["failed"] = True
        return result

    changed = result.get("changed", False)
    updates = result.get("updates", dict())
    filtered_updates = result.get("filtered_updates", dict())
    found_update_count = result.get("found_update_count", 0)
    installed_update_count = result.get("installed_update_count", 0)

    # Handle automatic reboots if the reboot flag is set
    if reboot and state == "installed" and not self._play_context.check_mode:
        previously_errored = False
        while (
            result["installed_update_count"] > 0
            or result["found_update_count"] > 0
            or result["reboot_required"] is True
        ):
            display.vvv(
                "win_updates: check win_updates results for "
                "automatic reboot: %s" % json.dumps(result)
            )

            # check if the module failed, break from the loop if it
            # previously failed and return error to the user
            if result.get("failed", False):
                if previously_errored:
                    break
                previously_errored = True
            else:
                previously_errored = False

            reboot_error = None
            # check if a reboot was required before installing the updates
            if (
                result.get("msg", "") == "A reboot is required before "
                "more updates can be installed"
            ):
                reboot_error = (
                    "reboot was required before more updates can be installed"
                )

            if result.get("reboot_required", False):
                if reboot_error is None:
                    reboot_error = "reboot was required to finalise update install"
                try:
                    changed = True
                    self._reboot_server(task_vars, reboot_timeout, use_task)
                except AnsibleError as exc:
                    result["failed"] = True
                    result["msg"] = "Failed to reboot remote host when %s: %s" % (
                        reboot_error,
                        to_text(exc),
                    )
                    break

            result.pop("msg", None)
            # rerun the win_updates module after the reboot is complete
            result = self._run_win_updates(new_module_args, task_vars, use_task)
            if result.get("failed", False):
                return result

            result_updates = result.get("updates", dict())
            result_filtered_updates = result.get("filtered_updates", dict())
            updates = self._merge_dict(updates, result_updates)
            filtered_updates = self._merge_dict(
                filtered_updates, result_filtered_updates
            )
            found_update_count += result.get("found_update_count", 0)
            installed_update_count += result.get("installed_update_count", 0)
            if result["changed"]:
                changed = True

    # finally create the return dict based on the aggregated execution
    # values if we are not in async
    if self._task.async_val == 0:
        result["changed"] = changed
        result["updates"] = updates
        result["filtered_updates"] = filtered_updates
        result["found_update_count"] = found_update_count
        result["installed_update_count"] = installed_update_count

    return result