PHP Fatal error: Class name must be a valid object or a string in i18n_translation.module on line 249

I'm getting these as well, seems very random

Please provide a list of you enabled i18n related modules.

I was debugging and found that the $class variable is just NULL for some pages on our site. As a temporary fix, this _seems_ to make things work.

/**
 * Build a translation set from type, data
 */
function i18n_translation_set_build($type, $data = array()) {
  $class = i18n_translation_set_info($type, 'class', 'i18n_translation_set');
  if ( empty($class) ) {
    $set = new i18n_translation_set((array)$data); // hack
  }
  else {
    $set = new $class((array)$data);
  }

  $set->type = $type;
  return $set;
}

Can you post the backtrace?

Could you give me instructions how to do it and I will :)

Please read Quick-and-Dirty Debugging for a first introduction.

Field Translation module was the culprit. Disabling it solved the errors.

I set this back to needs work because its an error in field translation module.

Changing to support request, setting priority, until we find out whether this is actually a bug in i18n.

Sorry for bumping this but has started happening here after a cache rebuild in various places

E.g. admin/structure/menu/manage/main-menu/translate

Fatal error: Call to a member function format_translation() on a non-object in /var/www/web142/web/drupal_files/modules/i18n/i18n_string/i18n_string.pages.inc on line 76 

admin/structure/menu/manage/translation

Fatal error: Class name must be a valid object or a string in /var/www/web142/web/drupal_files/modules/i18n/i18n_translation/i18n_translation.module on line 249 

Not quite sure where it may be coming from but it's running off empty caches so pretty sure it's not caching related.

Inserting a backtracer in i18n_translation_set_build I get this:

Array
(
    [0] => Array
        (
            [file] => /var/www/web142/web/drupal_files/modules/i18n/i18n_translation/i18n_translation.module
            [line] => 28
            [function] => i18n_translation_set_build
            [args] => Array
                (
                    [0] => menu_link
                    [1] => stdClass Object
                        (
                            [tsid] => 5
                            [title] => 
                            [type] => menu_link
                            [bundle] => 
                            [master_id] => 0
                            [status] => 0
                            [created] => 1328196530
                            [changed] => 1328196530
                        )

                )

        )

    [1] => Array
        (
            [file] => /var/www/drupal/drupal-7.12/includes/entity.inc
            [line] => 204
            [function] => attachLoad
            [class] => I18nTranslationSetController
            [object] => I18nTranslationSetController Object
                (
                    [entityCache:protected] => Array
                        (
                        )

                    [entityType:protected] => i18n_translation
                    [entityInfo:protected] => Array
                        (
                            [label] => Translation set
                            [controller class] => I18nTranslationSetController
                            [base table] => i18n_translation_set
                            [fieldable] => 
                            [entity keys] => Array
                                (
                                    [id] => tsid
                                    [bundle] => type
                                    [label] => title
                                    [revision] => 
                                )

                            [bundle keys] => Array
                                (
                                    [bundle] => type
                                )

                            [bundles] => Array
                                (
                                )

                            [static cache] => 1
                            [field cache] => 1
                            [load hook] => i18n_translation_load
                            [view modes] => Array
                                (
                                )

                            [translation] => Array
                                (
                                )

                            [schema_fields_sql] => Array
                                (
                                    [base table] => Array
                                        (
                                            [0] => tsid
                                            [1] => title
                                            [2] => type
                                            [3] => bundle
                                            [4] => master_id
                                            [5] => status
                                            [6] => created
                                            [7] => changed
                                        )

                                )

                            [apachesolr] => Array
                                (
                                    [indexable] => 
                                    [status callback] => 
                                    [document callback] => 
                                    [reindex callback] => 
                                )

                            [token type] => i18n_translation
                            [configuration] => 
                        )

                    [hookLoadArguments:protected] => Array
                        (
                        )

                    [idKey:protected] => tsid
                    [revisionKey:protected] => 
                    [revisionTable:protected] => 
                    [cache:protected] => 1
                )

            [type] => ->
            [args] => Array
                (
                    [0] => Array
                        (
                            [5] => stdClass Object
                                (
                                    [tsid] => 5
                                    [title] => 
                                    [type] => menu_link
                                    [bundle] => 
                                    [master_id] => 0
                                    [status] => 0
                                    [created] => 1328196530
                                    [changed] => 1328196530
                                )

                            [7] => stdClass Object
                                (
                                    [tsid] => 7
                                    [title] => 
                                    [type] => menu_link
                                    [bundle] => 
                                    [master_id] => 0
                                    [status] => 0
                                    [created] => 1328196662
                                    [changed] => 1328196662
                                )
[..]

                        )

                    [1] => 
                )

        )

    [2] => Array
        (
            [file] => /var/www/drupal/drupal-7.12/includes/common.inc
            [line] => 7585
            [function] => load
            [class] => DrupalDefaultEntityController
            [object] => I18nTranslationSetController Object
                (
                    [entityCache:protected] => Array
                        (
                        )

                    [entityType:protected] => i18n_translation
                    [entityInfo:protected] => Array
                        (
                            [label] => Translation set
                            [controller class] => I18nTranslationSetController
                            [base table] => i18n_translation_set
                            [fieldable] => 
                            [entity keys] => Array
                                (
                                    [id] => tsid
                                    [bundle] => type
                                    [label] => title
                                    [revision] => 
                                )

                            [bundle keys] => Array
                                (
                                    [bundle] => type
                                )

                            [bundles] => Array
                                (
                                )

                            [static cache] => 1
                            [field cache] => 1
                            [load hook] => i18n_translation_load
                            [view modes] => Array
                                (
                                )

                            [translation] => Array
                                (
                                )

                            [schema_fields_sql] => Array
                                (
                                    [base table] => Array
                                        (
                                            [0] => tsid
                                            [1] => title
                                            [2] => type
                                            [3] => bundle
                                            [4] => master_id
                                            [5] => status
                                            [6] => created
                                            [7] => changed
                                        )

                                )

                            [apachesolr] => Array
                                (
                                    [indexable] => 
                                    [status callback] => 
                                    [document callback] => 
                                    [reindex callback] => 
                                )

                            [token type] => i18n_translation
                            [configuration] => 
                        )

                    [hookLoadArguments:protected] => Array
                        (
                        )

                    [idKey:protected] => tsid
                    [revisionKey:protected] => 
                    [revisionTable:protected] => 
                    [cache:protected] => 1
                )

            [type] => ->
            [args] => Array
                (
                    [0] => Array
                        (
                            [0] => 24
                            [1] => 23
                            [2] => 22
                            [3] => 21
                            [4] => 20
                            [5] => 19
                            [6] => 18
                            [7] => 17
                            [8] => 16
                            [9] => 15
                            [10] => 10
                            [11] => 14
                            [12] => 13
                            [13] => 12
                            [14] => 11
                            [15] => 9
                            [16] => 8
                            [17] => 7
                            [18] => 5
                        )

                    [1] => Array
                        (
                        )

                )

        )

    [3] => Array
        (
            [file] => /var/www/web142/web/drupal_files/modules/i18n/i18n_translation/i18n_translation.admin.inc
            [line] => 39
            [function] => entity_load
            [args] => Array
                (
                    [0] => i18n_translation
                    [1] => Array
                        (
                            [0] => 24
                            [1] => 23
                            [2] => 22
                            [3] => 21
                            [4] => 20
                            [5] => 19
                            [6] => 18
                            [7] => 17
                            [8] => 16
                            [9] => 15
                            [10] => 10
                            [11] => 14
                            [12] => 13
                            [13] => 12
                            [14] => 11
                            [15] => 9
                            [16] => 8
                            [17] => 7
                            [18] => 5
                        )

                )

        )

    [4] => Array
        (
            [file] => /var/www/web142/web/drupal_files/modules/i18n/i18n_translation/i18n_translation.module
            [line] => 302
            [function] => i18n_translation_admin_overview
            [args] => Array
                (
                    [0] => menu_link
                )

        )

    [5] => Array
        (
            [function] => i18n_translation_set_list_manage
            [args] => Array
                (
                    [0] => menu_link
                )

        )

    [6] => Array
        (
            [file] => /var/www/drupal/drupal-7.12/includes/menu.inc
            [line] => 517
            [function] => call_user_func_array
            [args] => Array
                (
                    [0] => i18n_translation_set_list_manage
                    [1] => Array
                        (
                            [0] => menu_link
                        )

                )

        )

    [7] => Array
        (
            [file] => /var/www/drupal/drupal-7.12/index.php
            [line] => 21
            [function] => menu_execute_active_handler
            [args] => Array
                (
                )

        )

)

EDIT: shortened dump

I think it's got to do with i18n_object_info not returning the object info for menus. I've inserted this into i18n.module, line 351:

function i18n_object_info($type = NULL, $property = NULL, $default = NULL) {
  krumo::dump(module_implements('i18n_object_info'));

and it gives an empty array though I found
function i18n_menu_i18n_object_info() {
in i18n_menu/i18n_menu.i18n.inc

I think this is a bug. I've inserted this:

function i18n_object_info($type = NULL, $property = NULL, $default = NULL) {
  module_load_include('i18n.inc', 'i18n_menu');

cleared cache_boostrap.module_implements and the PHP fatal errors have disappeared. Commenting out the module_load_include and flushing the cache the fatal errors are back.

Same issue here...

Now trying i18n_taxonomy and seems to get worse. Any ideas? I'm stuck but found this which seems related #1237266-1: Test with taxonomy translation + core menu + taxonomy menu.

@guillaumev: the site you're experiencing this, was it upgraded from D6 or is it a fresh D7 site?

I think it has to do with the order the modules get called. On another site where everything works i18n gets called before 18n_string though they are both weight=10. On the broken site i18n_string gets called before i18n. Changing the module weight of i18n_string to 15 fixes the problem and all others here:

UPDATE `system` SET `weight` = '15' WHERE `name` = 'i18n_string';

Suggesting to change this in dev after review by module maintainer.

Thanks @miimooo - that fixed it for me. I was getting that nasty WSOD from en/admin/structure/menu/item/2494/edit

EDIT - Wait.. It comes back when I clear the cache, so that's not it....

May be unrelated, it's definitely fixed here. Have you followed http://drupal.org/node/158043 ?

Thanks for the WSOD reference. It's intermittent, but will definitely want to follow up on that if it persists.

a) No patch for 'needs review' so changing status.

b) Some hooks have been reworked in latest -dev, try that version.

c) Changing module weights is not a solution unless we identify what is failing here.

Thanks. I've checked the latest dev and works.

I confirm that the problem of
PHP Fatal error: Call to a member function format_translation() on a non-object
does not exist any more in the latest dev.

True, the DEV release doesn't bork.

Current translation sets seem to work too.

But all the sets are listed as undefined // unkown