Seen on travis on PHP 7.2 <https://travis-ci.org/wikimedia/mediawiki/jobs/368430010>
* 30 December 2017: 8x errors for "Parameter must be an array or an object that implements Countable"
* 18 April 2018: 11x errors for "Parameter must be an array or an object that implements Countable"
```lines=20
1) BitmapMetadataHandlerTest::testMultilingualCascade
count(): Parameter must be an array or an object that implements Countable
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:745
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:336
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:308
/home/travis/build/wikimedia/mediawiki/includes/media/BitmapMetadataHandler.php:92
/home/travis/build/wikimedia/mediawiki/includes/media/BitmapMetadataHandler.php:188
/home/travis/build/wikimedia/mediawiki/tests/phpunit/includes/media/BitmapMetadataHandlerTest.php:32
/home/travis/build/wikimedia/mediawiki/tests/phpunit/MediaWikiTestCase.php:420
/home/travis/build/wikimedia/mediawiki/maintenance/doMaintenance.php:94
2) ExifTest::testGPSExtraction
count(): Parameter must be an array or an object that implements Countable
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:745
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:336
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:308
/home/travis/build/wikimedia/mediawiki/tests/phpunit/includes/media/ExifTest.php:24
/home/travis/build/wikimedia/mediawiki/tests/phpunit/MediaWikiTestCase.php:420
/home/travis/build/wikimedia/mediawiki/maintenance/doMaintenance.php:94
3) ExifTest::testUnicodeUserComment
count(): Parameter must be an array or an object that implements Countable
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:745
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:336
/home/travis/build/wikimedia/mediawiki/includes/media/Exif.php:308
/home/travis/build/wikimedia/mediawiki/tests/phpunit/includes/media/ExifTest.php:39
/home/travis/build/wikimedia/mediawiki/tests/phpunit/MediaWikiTestCase.php:420
/home/travis/build/wikimedia/mediawiki/maintenance/doMaintenance.php:94