=== Error ===
`MediaWiki version:` **`1.36.0-wmf.16`**
```name=message
Argument 2 passed to GrowthExperiments\NewcomerTasks\TaskSuggester\CacheDecorator::suggest() must be of the type array, null given, called in /srv/mediawiki/php-1.36.0-wmf.16/extensions/GrowthExperiments/includes/NewcomerTasks/TaskSuggester/NewcomerTasksCacheRefreshJob.php on line 35
```
=== Impact ===
Low impact; jobs to proactively refresh the cache of newcomer tasks are failing. This means that 7 days after a visit to Special:Homepage, a page load will take several seconds instead of <1 second.
=== Notes ===
In CacheDecorator we create the job like this:
``` lang=php
$this->jobQueueGroup->lazyPush(
new NewcomerTasksCacheRefreshJob( [
'userId' => $user->getId(),
'taskTypeFilters' => $taskSetFilters->getTaskTypeFilters(),
'topicFilters' => $taskSetFilters->getTopicFilters(),
'limit' => SearchTaskSuggester::DEFAULT_LIMIT,
'jobReleaseTimestamp' => (int)wfTimestamp() +
// Process the job the day before the cache expires.
( $this->cache::TTL_WEEK - $this->cache::TTL_DAY ),
] )
);
```
TaskSetFilters is constructed with two arrays, and getTaskTypeFilters and getTopicFilters are both typed to return arrays. SearchTaskSuggester::DEFAULT_LIMIT is a constant that returns an integer value.
The erroring code in NewcomerTasksCacheRefreshJob is:
``` lang=php
$taskSuggester->suggest(
$user,
$this->params['taskTypeFilters'],
$this->params['topicFilters'],
$this->params['limit'],
null,
false,
false
);
```
And from the stacktrace it looks like somehow taskTypeFilters, topicFilters, and limit are all null. I don't understand how this is possible, unless there is some mechanism that is erroring on the array / int values (but somehow not the user ID int value?).