===Contextual Design Information===
 
===Contextual Design Information===
Exception encountered, of type "Error"
[6c0e842f] /deepphe/wiki/index.php?diff=prev&oldid=50&title=Main_Page Error from line 434 of /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php: Call to undefined function each()
Backtrace:
#0 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php(544): DiffEngine->diag(integer, integer, integer, integer, integer)
#1 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php(344): DiffEngine->compareSeq(integer, integer, integer, integer)
#2 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php(227): DiffEngine->diffLocal(array, array)
#3 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php(721): DiffEngine->diff(array, array)
#4 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php(859): Diff->__construct(array, array)
#5 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DairikiDiff.php(980): MappedDiff->__construct(array, array, array, array)
#6 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/TableDiffFormatter.php(194): WordLevelDiff->__construct(array, array)
#7 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DiffFormatter.php(140): TableDiffFormatter->changed(array, array)
#8 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DiffFormatter.php(82): DiffFormatter->block(integer, integer, integer, integer, array)
#9 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(910): DiffFormatter->format(Diff)
#10 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(828): DifferenceEngine->textDiff(string, string)
#11 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/poolcounter/PoolCounterWorkViaCallback.php(69): DifferenceEngine->{closure}()
#12 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/poolcounter/PoolCounterWork.php(123): PoolCounterWorkViaCallback->doWork()
#13 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(841): PoolCounterWork->execute()
#14 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(797): DifferenceEngine->generateTextDiffBody(string, string)
#15 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(728): DifferenceEngine->generateContentDiffBody(WikitextContent, WikitextContent)
#16 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(662): DifferenceEngine->getDiffBody()
#17 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(632): DifferenceEngine->getDiff(string, string, string)
#18 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/diff/DifferenceEngine.php(453): DifferenceEngine->showDiff(string, string, string)
#19 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/page/Article.php(797): DifferenceEngine->showDiffPage(boolean)
#20 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/page/Article.php(508): Article->showDiffPage()
#21 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/actions/ViewAction.php(44): Article->view()
#22 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/MediaWiki.php(490): ViewAction->show()
#23 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/MediaWiki.php(287): MediaWiki->performAction(Article, Title)
#24 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/MediaWiki.php(714): MediaWiki->performRequest()
#25 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/includes/MediaWiki.php(508): MediaWiki->main()
#26 /n/www/healthnlp.hms.harvard.edu/docroot/deepphe/wiki/index.php(41): MediaWiki->run()
#27 {main}