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[Mahara Bot <1569552@xxxxxxxxxxxxxxxxxx>]

Patch for "16.04_STABLE" branch: https://reviews.mahara.org/6405

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https://bugs.launchpad.net/bugs/1569552

Title:
  White screen when copying collection / page

Status in Mahara:
  In Progress
Status in Mahara 16.04 series:
  In Progress
Status in Mahara 16.10 series:
  Fix Committed

Bug description:
  When attempting to copy a collection or page on 16.04RC1, a white
  screen appears and the following error is reported to the logs:

  [12-Apr-2016 13:22:03] PHP Fatal error:  Call to undefined function
  artefact_get_descendants() in /home/darren/public_html/m1604/blocktype/lib.php
  on line 1548
  [12-Apr-2016 13:22:03] PHP Stack trace:
  [12-Apr-2016 13:22:03] PHP   1. {main}()
  /home/darren/public_html/m1604/view/choosetemplate.php:0
  [12-Apr-2016 13:22:03] PHP   2. pieform()
  /home/darren/public_html/m1604/view/choosetemplate.php:30
  [12-Apr-2016 13:22:03] PHP   3. Pieform::process()
  /home/darren/public_html/m1604/lib/mahara.php:4493
  [12-Apr-2016 13:22:03] PHP   4. Pieform->__construct()
  /home/darren/public_html/m1604/lib/pieforms/pieform.php:161
  [12-Apr-2016 13:22:03] PHP   5. call_user_func_array()
  /home/darren/public_html/m1604/lib/pieforms/pieform.php:540
  [12-Apr-2016 13:22:03] PHP   6. createview_submit()
  /home/darren/public_html/m1604/lib/pieforms/pieform.php:540
  [12-Apr-2016 13:22:03] PHP   7. Collection::create_from_template()
  /home/darren/public_html/m1604/lib/view.php:6436
  [12-Apr-2016 13:22:03] PHP   8. View::create_from_template()
  /home/darren/public_html/m1604/lib/collection.php:292
  [12-Apr-2016 13:22:03] PHP   9. View->copy_contents()
  /home/darren/public_html/m1604/lib/view.php:400
  [12-Apr-2016 13:22:03] PHP  10. BlockInstance->copy()
  /home/darren/public_html/m1604/lib/view.php:5445

  This appears to be due to the artefact_get_descendants() function not
  being available to the BlockInstance::copy() function in
  blocktype/lib.php:1548

  Adding require_once(get_config('docroot') . 'artefact/lib.php');
  appears to clear the issue up.

  Diff attached.

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