Notice: Undefined property: stdClass::$nid in auto_nodetitle_set_title()

I also have the same issue.

Notice: Undefined property: stdClass::$nid in ex_contents() (line 30 of C:\wamp\www\drupal-7.14\sites\default\modules\a\a.module).
Notice: Undefined property: stdClass::$nid in ex_contents() (line 30 of C:\wamp\www\drupal-7.14\sites\default\modules\a\a.module).
Notice: Undefined property: stdClass::$nid in ex_contents() (line 30 of C:\wamp\www\drupal-7.14\sites\default\modules\a\a.module).

function a_block_view($bs_name = '')
{
if($bs_name = 'node')
{ 
$block = array();
$block['subject'] = t('Recent Articles');
$block['content'] = ex_contents();
}
return $block;
}
function ex_contents() 
{
$p = '';
$query = db_select('node', 'n');
$query->condition('n.type', 'article', '=')
->fields('n', array('title'))
->range(0, 50);
$result = $query->execute();
foreach ($result as $node) {
$node->nid;
$rows[] = array('data' => $node, 'class' => array('accessible'));
}
$p .= '<div>' . theme('table', array('rows' => $rows)) . '</div>';
return $p;
}

This thread seems to be a bit nuts, but I'm 100% getting that notice in the title. In my case it's caused by creating a node using Rules. When you want to create a new node with rules you must use the "create entity" action which turns out a new node object that (for reasons complicated) doesn't get an nid property until after the save is complete. When ANT runs it's trying to read the nid property and that's producing a notice.

It's a simple fix - line 81, change elseif ($node->nid) { to elseif (!empty($node->nid)) {

Solution in #4 worked for me.

Providing a patch implementing #4.

Have just ran into this issue as well, patch in #6 solves the issue and is an appropriate fix.

The patch works as designed