mediawiki-extensions-hhvm-jessie is failing on wmf/1.32.0-wmf.3.
From https://gerrit.wikimedia.org/r/#/c/432960/:
```
08:49:39 There were 3 failures:
08:49:39
08:49:39 1) EchoDiscussionParserTest::testGenerateEventsForRevision with data set #1 (138275105, 138274875, 'Schnark', 'de', array(), 'UTPage', array(array('mention', 'Schnark', 'Echo-Test')))
08:49:39 Failed asserting that two arrays are equal.
08:49:39 --- Expected
08:49:39 +++ Actual
08:49:39 @@ @@
08:49:39 Array (
08:49:39 - 0 => Array (...)
08:49:39 )
08:49:39
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/extensions/Echo/tests/phpunit/DiscussionParserTest.php:402
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/tests/phpunit/MediaWikiTestCase.php:423
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/maintenance/doMaintenance.php:94
08:49:39
08:49:39 2) EchoDiscussionParserTest::testGenerateEventsForRevision with data set #2 (40610292, 40608353, 'PauloEduardo', 'pt', array('[[User:{{{1|<noinclude>Exempl...clude>'), 'UTPage', array(array('mention', 'PauloEduardo', 'Notificações')))
08:49:39 Failed asserting that two arrays are equal.
08:49:39 --- Expected
08:49:39 +++ Actual
08:49:39 @@ @@
08:49:39 Array (
08:49:39 - 0 => Array (...)
08:49:39 )
08:49:39
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/extensions/Echo/tests/phpunit/DiscussionParserTest.php:402
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/tests/phpunit/MediaWikiTestCase.php:423
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/maintenance/doMaintenance.php:94
08:49:39
08:49:39 3) EchoDiscussionParserTest::testSigningDetection with data set #10 ('Test --[[Benutzer:Schnark]] (...|js]])', array(7, 'Schnark'))
08:49:39 false does not match expected type "array".
08:49:39
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/extensions/Echo/tests/phpunit/DiscussionParserTest.php:1053
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/tests/phpunit/MediaWikiTestCase.php:423
08:49:39 /home/jenkins/workspace/mediawiki-extensions-hhvm-jessie/src/maintenance/doMaintenance.php:94
08:49:39
08:49:39 FAILURES!
08:49:39 Tests: 15433, Assertions: 144048, Failures: 3, Skipped: 212.
```