EntityMalformedException: site:drupal.org Missing bundle property on entity of type node. in entity_extract_ids() (line 7633

Hey,
I came up against this error yesterday. I'm not sure which part of the following was the cause of the issue, but I wanted to document it in case it helps anyone/maintainers:
I got a EntityMalformedException: site:drupal.org Missing bundle property on entity of type node. in entity_extract_ids() (line 7633 of common.inc) error under the following conditions:

* a view (with a contextual filter of nid) had a rules_link field
* the rules_link field had a relationship to another nid entity through entityreference module

when logged out, the nodes were accessible - both those with and without the relationship (the link was hidden in those cases)

when logged in, the nodes which had a relationship were visible, but those that did not came up with a screen of death with the above error.

I removed the relationship in views and it worked again. I then rebuilt the relationship using rules instead of views and it all seems OK now - so i think its something to do with the combination of rules_link and entityreference where you don't have a reference defined. Once fixed the link was hidden when there was no relationship, as you'd expect.

I hope this helps!