After an upgrade to PHP 8.0 on a Drupal 7 site we noticed our logs were getting full. Per Student login there were around 150 of these warnings in the logs:
Warning: Trying to access array offset on value of type null in MatchingResponse->score() (regel 491 van /data/www/sitename/web/sites/all/modules/contrib/quiz/question_types/matching/matching.classes.inc).
Warning: Undefined array key "def" in MatchingResponse->score() (regel 491 van /data/www/sitename/web/sites/all/modules/contrib/quiz/question_types/matching/matching.classes.inc).
Every time a quiz was taken and the answers were matched these warnings appeared.
Fixed
5.7
Code - Matching
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Issue #3332279 by EstherTempel: Warning: Trying to access array offset...
Change seems small enough don't mind including in last few release of D7 quiz.
Automatically closed - issue fixed for 2 weeks with no activity.