Invalid argument supplied for foreach in entityreference_field_widget_form()

Patch from #1 appears to work.

Sorry for the late reply... :)
Seems to be already resolved.

Is there a reason this patch was never applied. I am migrating one of our drupal sites and noticed that a developer had this patch code in our entityreference.module. Looking in the source repository, I don't see the fix merged in anywhere. Is it necessary? If so can the patch be applied in the next release?
Thanks

Re-opening as we ran into this issue during a Commons sprint. Commons uses a combination of OG, Entity Reference Prepopulate, and Entity Reference. In cases where a prepopulate argument isn't passed in the URL, we receive this warning. I believe the fix is simple: Don't assume $items has a value. Patch attached against 7.x-1.x.

facing the same issue..

Was receiving same error on creation of node where a prepopulate argument isn't passed in the URL.

Patch in #5 seems to work well.

Thank you for working on this.

Ditto daniel-san.

My guess is whatever is calling that function is suppose to be passing in $items an array and that the error may be from the calling function instead. Not experiencing this error so haven't looked inot

correction

The 6 year old patch in #5 to entityreference.module does not apply to the latest 7.x-1.x-dev and if still relevant needs a reroll.

Checking patch entityreference.module...
error: while searching for:
    $entity_labels = array();

    // Build an array of entities ID.
    foreach ($items as $item) {
      $entity_ids[] = $item['target_id'];
    }

    // Load those entities and loop through them to extract their labels.

error: patch failed: entityreference.module:812
error: entityreference.module: patch does not apply