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![Variables are broken and returning NULL values for Drupal 8.7.x [#3016888] | Drupal.org](https://www.drupal.org/files/issues/2019-08-01/screenshot%20no.%202%20-%20test%20variable.png "Variables are broken and returning NULL values for Drupal 8.7.x [#3016888] | Drupal.org")
Variables are broken and returning NULL values for Drupal 8.7.x [#3016888] | Drupal.org
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Add Views EntityReference filter to be available for all entity reference fields [#2429699] | Drupal.org
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Updates run in unpredictable order [#211182] | Drupal.org
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Add Views EntityReference filter to be available for all entity reference fields [#2429699] | Drupal.org
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Add backtrace to all errors [#1158322] | Drupal.org
4. Drupal Programming Examples - Programmer's Guide to Drupal, 2nd Edition [Book]
