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[Robert Lyon <robertl@xxxxxxxxxxxxxxx>]

The error messages have been fixed by
https://reviews.mahara.org/#/c/6976/1 as we now check that an annotation
has evidence before trying to ascertain the evidence's state.

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https://bugs.launchpad.net/bugs/1629144

Title:
  Error message when copying a SmartEvidence collection with annotations

Status in Mahara:
  Confirmed

Bug description:
  Mahara 16.10dev

  1. Set up a SmartEvidence collection.
  2. Put a couple of annotations on the page.
  3. Add a couple of feedbacks to the annotations.
  4. Copy the collection in the same user account.
  5. Open a page that has an annotation.

  I get the following error message multiple times:

  [WAR] 5f (artefact/annotation/lib.php:1294) Trying to get property of non-object
  Call stack (most recent first):

      log_message("Trying to get property of non-object", 8, true, true, "/home/kristina/code/1610stable/htdocs/artefact/ann...", 1294) at /home/kristina/code/1610stable/htdocs/lib/errors.php:513
      error(8, "Trying to get property of non-object", "/home/kristina/code/1610stable/htdocs/artefact/ann...", 1294, array(size 13)) at /home/kristina/code/1610stable/htdocs/artefact/annotation/lib.php:1294
      ArtefactTypeAnnotationfeedback::add_annotation_feedback_form(object(ArtefactTypeAnnotation), object(View), null, "1061", false, "0") at /home/kristina/code/1610stable/htdocs/artefact/annotation/lib.php:1132
      ArtefactTypeAnnotationfeedback::get_annotation_feedback_for_view(object(ArtefactTypeAnnotation), object(View), "1061", true, false) at /home/kristina/code/1610stable/htdocs/artefact/annotation/blocktype/annotation/lib.php:134
      PluginBlocktypeAnnotation::render_instance(object(BlockInstance)) at Unknown:0
      call_user_func_array(array(size 2), array(size 1)) at /home/kristina/code/1610stable/htdocs/lib/mahara.php:1730
      call_static_method("PluginBlocktypeAnnotation", "render_instance", object(BlockInstance)) at /home/kristina/code/1610stable/htdocs/blocktype/lib.php:1007
      BlockInstance->render_viewing(false) at /home/kristina/code/1610stable/htdocs/lib/view.php:2037
      View->build_column(1, 1, false, false) at /home/kristina/code/1610stable/htdocs/lib/view.php:1991
      View->build_columns(1, false, false) at /home/kristina/code/1610stable/htdocs/lib/view.php:1976
      View->build_rows() at /home/kristina/code/1610stable/htdocs/view/view.php:281

  ----

  If possible, the annotations should be linked to the map in the copied
  collection. Currently, the annotations display on the page, but their
  status doesn't shop up on the smartEvidence overview page.

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