Exception thrown when deleting an entity with a field collection

I am having what appears to be the same issue. It is a content type with a field collection that also contains a field collection. It was preventing me from deleting content of that type. The following appears to fix it in my case (though I am not sure if there are other implications such as possible orphaned field collections or cer references) allowing me to delete the content without error.

--- cer.properties.field_collection.inc (revision 5310)
+++ cer.properties.field_collection.inc (working copy)
@@ -29,6 +29,11 @@

   $data[0] = $collection->hostEntityType();
   $data[1] = $collection->hostEntity();
+
+  if (! $data[1]) {
+    return $options['lineage'];
+  }
+
   list (, , $host_bundle) = entity_extract_IDs($data[0], $data[1]);
   array_unshift($options['lineage'], $data[0] . ":{$host_bundle}:{$collection->field_name}");

I've created a patch for this fix. For me it solves all issues.

#3 doesn not resolve the issue for me. It throw an exception when I delete a field collection synced with CER :

EntityMetadataWrapperException: Unable to get the data property field_entity_reference as the parent data structure is not set. in EntityStructureWrapper->getPropertyValue() (line 438 of /home/www/sites/all/modules/entity/includes/entity.wrapper.inc).

My problem was I had a field collection within a paragraph. Non of these fields had CER attached. Another field within the node that wasn't a field collection or a paragraph bundle was attached. When I tried to delete the node, I received an error which was fixed by #3. So I think the patch in #3 needs to be applied, but more needs to be added if that field has a cer attached to it.

The patch solved my issue too.
I simply had cer enabled on my system.
I had an event type with field_collections
Deleting the event would trigger cer delete which throws an exception on the field_collection.

I have not tried the case where a field is in a field_collection and is using cer

Same problem here and #3 solves it.

My Profile2 type uses field_collection type fields, but these fields are not using cer ( cer is enabled and there are some cer presets configured to other fields ).
I think so the field_collection type fields are or are not using cer presets is irrelevant, because entity_delete() invokes cer_entity_delete() at all events.

I think it's major because it causes mysterious, difficult to debug errors

This patch solved my problems.
ECK entity with a field collection, CER module installed.
Deleting the event would trigger cer delete which throws an exception on the field_collection.

Three people reporting that the patch fixes their problem, is good enough for me. Committed and pushed -- thanks!

Note to anyone who might need this: it's not in the 7.x-3.0-beta1 release.