After upgrading "Fatal error: __clone method called on non-object in /includes/common.inc on line 1736"

It would be cool if you could export one of the views which are not working anymore.

It's like comparing apples with pears. It makes no sense as long you don't have mapping between them.

This function can be called by a lot of! functions. So it is important to be able to reproduce it.
Does [834222] fix it for you?

If it's related to date module views i suggest you to move the issue to the date issue queue.

I was getting this on 6x-2.11, so I upgraded to 3xdev. Unfortunately that didn't fix it. Here's an export of the view that I'm trying to build. Would love to get past this....

$view = new view;
$view->name = 'recent_images';
$view->description = '';
$view->tag = '';
$view->view_php = '';
$view->base_table = 'node';
$view->is_cacheable = FALSE;
$view->api_version = 3.0-alpha1;
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */

/* Display: Recent Images */
$handler = $view->new_display('default', 'Recent Images', 'default');
$handler->display->display_options['distinct'] = TRUE;
$handler->display->display_options['access']['type'] = 'none';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'mini';
$handler->display->display_options['pager']['options']['items_per_page'] = 100;
$handler->display->display_options['style_plugin'] = 'default';
$handler->display->display_options['row_plugin'] = 'fields';
/* Empty text: Global: Text area */
$handler->display->display_options['empty']['text']['id'] = 'area';
$handler->display->display_options['empty']['text']['table'] = 'views';
$handler->display->display_options['empty']['text']['field'] = 'area';
$handler->display->display_options['empty']['text']['label'] = '';
$handler->display->display_options['empty']['text']['empty'] = FALSE;
$handler->display->display_options['empty']['text']['content'] = 'EMPTY';
/* Field: Content: Image (field_image) */
$handler->display->display_options['fields']['field_image_fid']['id'] = 'field_image_fid';
$handler->display->display_options['fields']['field_image_fid']['table'] = 'node_data_field_image';
$handler->display->display_options['fields']['field_image_fid']['field'] = 'field_image_fid';
$handler->display->display_options['fields']['field_image_fid']['alter']['alter_text'] = 0;
$handler->display->display_options['fields']['field_image_fid']['alter']['make_link'] = 0;
$handler->display->display_options['fields']['field_image_fid']['alter']['trim'] = 0;
$handler->display->display_options['fields']['field_image_fid']['alter']['word_boundary'] = 1;
$handler->display->display_options['fields']['field_image_fid']['alter']['ellipsis'] = 1;
$handler->display->display_options['fields']['field_image_fid']['alter']['strip_tags'] = 0;
$handler->display->display_options['fields']['field_image_fid']['alter']['html'] = 0;
$handler->display->display_options['fields']['field_image_fid']['hide_empty'] = 1;
$handler->display->display_options['fields']['field_image_fid']['empty_zero'] = 0;
$handler->display->display_options['fields']['field_image_fid']['link_to_node'] = 1;
$handler->display->display_options['fields']['field_image_fid']['label_type'] = 'none';
$handler->display->display_options['fields']['field_image_fid']['format'] = 'gallery_assist_thumb_150_default';
/* Field: Image attach: Attached images */
$handler->display->display_options['fields']['image_attach_images']['id'] = 'image_attach_images';
$handler->display->display_options['fields']['image_attach_images']['table'] = 'node';
$handler->display->display_options['fields']['image_attach_images']['field'] = 'image_attach_images';
$handler->display->display_options['fields']['image_attach_images']['label'] = '';
$handler->display->display_options['fields']['image_attach_images']['alter']['alter_text'] = 0;
$handler->display->display_options['fields']['image_attach_images']['alter']['make_link'] = 0;
$handler->display->display_options['fields']['image_attach_images']['alter']['trim'] = 0;
$handler->display->display_options['fields']['image_attach_images']['alter']['word_boundary'] = 1;
$handler->display->display_options['fields']['image_attach_images']['alter']['ellipsis'] = 1;
$handler->display->display_options['fields']['image_attach_images']['alter']['strip_tags'] = 0;
$handler->display->display_options['fields']['image_attach_images']['alter']['html'] = 0;
$handler->display->display_options['fields']['image_attach_images']['hide_empty'] = 1;
$handler->display->display_options['fields']['image_attach_images']['empty_zero'] = 0;
$handler->display->display_options['fields']['image_attach_images']['link_to_node'] = 1;
$handler->display->display_options['fields']['image_attach_images']['image_derivative'] = 'tumb_150';
$handler->display->display_options['fields']['image_attach_images']['as_link'] = 'node';
/* Field: Image: Image */
$handler->display->display_options['fields']['image_image']['id'] = 'image_image';
$handler->display->display_options['fields']['image_image']['table'] = 'node';
$handler->display->display_options['fields']['image_image']['field'] = 'image_image';
$handler->display->display_options['fields']['image_image']['alter']['alter_text'] = 0;
$handler->display->display_options['fields']['image_image']['alter']['make_link'] = 0;
$handler->display->display_options['fields']['image_image']['alter']['absolute'] = 0;
$handler->display->display_options['fields']['image_image']['alter']['trim'] = 0;
$handler->display->display_options['fields']['image_image']['alter']['word_boundary'] = 1;
$handler->display->display_options['fields']['image_image']['alter']['ellipsis'] = 1;
$handler->display->display_options['fields']['image_image']['alter']['strip_tags'] = 0;
$handler->display->display_options['fields']['image_image']['alter']['html'] = 0;
$handler->display->display_options['fields']['image_image']['hide_empty'] = 0;
$handler->display->display_options['fields']['image_image']['empty_zero'] = 0;
$handler->display->display_options['fields']['image_image']['link_to_node'] = 0;
$handler->display->display_options['fields']['image_image']['image_derivative'] = '_original';
/* Sort criterion: Node: Post date */
$handler->display->display_options['sorts']['created']['id'] = 'created';
$handler->display->display_options['sorts']['created']['table'] = 'node';
$handler->display->display_options['sorts']['created']['field'] = 'created';
$handler->display->display_options['sorts']['created']['order'] = 'DESC';
/* Filter: Node: Published */
$handler->display->display_options['filters']['status']['id'] = 'status';
$handler->display->display_options['filters']['status']['table'] = 'node';
$handler->display->display_options['filters']['status']['field'] = 'status';
$handler->display->display_options['filters']['status']['value'] = '1';
$handler->display->display_options['filters']['status']['expose']['operator'] = FALSE;

Do you have a recent version of cck installed?

Additional when you have such an error please enable the devel module on your site and write something like this into the drupal_clone function in includes/common.inc previous to the php error line.

function drupal_clone($object) {
  dsm(views_trace());
  return version_compare(phpversion(), '5.0') < 0 ? $object : clone($object);
}

Based on this you can find out what called the drupal_clone function and based on this you might be able to find the root of the problem.

no activity for 30 days

I've the same problem.
After I upgraded views to 6.x-3.0-alpha3 or 6.x-3.0-dev, I've following error:

Fatal error: __clone method called on non-object in includes/common.inc on line 1733

I've CCK 6.x-3.0-alpha3, I had as well previous stable version (no difference).
So I think it's the same problem.

I see this error from CLI, because I can't see any error on the page (some MAMP bug):

$ ./drupal.sh http://drupal6/price_list
Fatal error: __clone method called on non-object in /Users/kenorb/Sites/drupal6/includes/common.inc on line 1733

This view DOES work with 6.x-2.12!

My exported view: http://pastebin.com/vxjQnx8H

Steps to reproduce:
1. Create 'company' content type and add few nodes.
2. Create 'product' content type and add few nodes.
3. Create 'Prices' vocabulary in taxonomy and add few nodes.
4. Tag some of the nodes with terms.
5. Import view from: http://pastebin.com/vxjQnx8H
6. Go to view page: /price_list
You should see the error (I think).

Query is as follow:

SELECT node_term_node.title AS node_term_node_title, node_term_node.nid AS node_term_node_nid, term_data_term_relation.name AS term_data_term_relation_name, term_data_term_relation.vid AS term_data_term_relation_vid, term_data_term_relation.tid AS term_data_term_relation_tid, node_term_node_1.title AS node_term_node_1_title, node_term_node_1.nid AS node_term_node_1_nid FROM term_data term_data  LEFT JOIN term_node term_node ON term_data.tid = term_node.tid INNER JOIN node node_term_node ON term_node.vid = node_term_node.vid LEFT JOIN term_node node_term_node__term_node ON node_term_node.vid = node_term_node__term_node.vid LEFT JOIN term_node node_term_node_node_term_node__term_node ON node_term_node.vid = node_term_node_node_term_node__term_node.vid LEFT JOIN term_relation node_term_node__term_relation ON node_term_node__term_node.tid = node_term_node__term_relation.tid1 INNER JOIN term_data term_data_term_relation ON node_term_node__term_relation.tid2 = term_data_term_relation.tid LEFT JOIN term_node term_data_term_relation__term_node ON term_data_term_relation.tid = term_data_term_relation__term_node.tid INNER JOIN node node_term_node_1 ON term_data_term_relation__term_node.vid = node_term_node_1.vid WHERE (term_data.vid in ('1')) AND (node_term_node.type in ('company')) AND (node_term_node_1.type in ('product'))

This is Taxonomy View and there are 3 relationships:
1. 'company': Taxonomy: Node (all nodes tagged by terms).
2. 'company2product': Taxonomy: Related terms (Relationship to 'company' - all terms related to 'company' content)
3. 'product': Taxonomy: Node (Relationship to 'company2product')
Basically the purpose of the terms are kind of gateway, which connecting two kind of nodes (something like node-reference, but without

There is another thing.
Testing page load of the same page: /price_list based on xdebug logs between 6.x-2.12 and 6.x-3.x - the difference of size xdebug log is very huge:

-rw-r--r--   1 kenorb  wheel   50M 12 Jul 01:04 drupal6_price_list--1310429084.xt (6.x-2.12)
-rw-r--r--   1 kenorb  wheel  471M 12 Jul 01:06 drupal6_price_list--1310429146.xt (6.x-3.x)

Looks like 3.x has some kind of loop.

I had that problem on Mac (MAMP) with PHP 5.2.17, I'll try to reproduce it on different environment (Linux).

I've tested again, but on Linux this time.
I could reproduce this issue again, but I had to change the view a little:
Import from here: http://pastebin.com/cq6Xbx1y
Views:  6.x-3.0-alpha3 (BUT works on 6.x-3.0-dev)
CCK: 6.x-2.9

Backtrace:

$object =

null

Looks like it was fixed somehow in dev.
It doesn't happen with latest dev.

My mistake, it doesn't work with latest dev (it was 2.12).

Here is backtrace from latest dev:

$object =

null

Attached feature including broken Views, Content types: company and product, and Taxonomy vocabulary.
After enabling go to: /price_list (to see the error).

In fact this variable isn't used.

I'm not sure whether this is the right way to fix it.

Works great for me, removes the fatal error.

Okay the patch against 6.x-3.x worked, commited.
Sadly it didn't worked for 6.x-2.x

@kenorb
Does this all this applies to drupal7?

I didn't test on Drupal 7

Might be a problem on D7 as well; I'm testing Views Tree and some relationships, and I'm hitting this issue. I'll test and see. (Nevermind, seems to possibly be unrelated... possibly. See #1493234: Getting PHP Fatal error: __clone method called on non-object in views_handler_field_field.inc).

adjust_join shouldn't be being called when there's no join defined. This has been fixed in this issue #887768: Notice: Undefined index: in views_query->add_table().

The removal of the add_table line will break a relationship between a node and its terms (unless you're lucky and the term_node is already in the query for some other reason). See issue #1409640: Taxonomy terms on node relationship potentially joins on wrong table where the problem has been reported and I've posted a patch reverting dawehner's change above.