Bounce processing fails for 4-byte unicode characters
When the bounced message contains any 4-byte unicode character, it cannot be saved to the database due to the currently missing support for utf8mb4 in CiviCRM.
Error Log:
[info] $backTrace = #0 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/CRM/Core/Error.php(948): CRM_Core_Error::backtrace("backTrace", TRUE)
#1 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/PEAR.php(921): CRM_Core_Error::exceptionHandler(Object(DB_Error))
#2 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB.php(985): PEAR_Error->__construct("DB Error: unknown error", -1, 16, (Array:2), "INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...")
#3 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/PEAR.php(575): DB_Error->__construct(-1, 16, (Array:2), "INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...")
#4 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/PEAR.php(223): PEAR->_raiseError(Object(DB_mysqli), NULL, -1, 16, (Array:2), "INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...", "DB_Error", TRUE)
#5 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB/common.php(1907): PEAR->__call("raiseError", (Array:7))
#6 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB/mysqli.php(933): DB_common->raiseError(-1, NULL, NULL, "INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...", "1366 ** Incorrect string value: '\xF0\x9F\x8C\xB4' for column 'bounce_reason'...")
#7 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB/mysqli.php(403): DB_mysqli->mysqliRaiseError()
#8 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB/common.php(1216): DB_mysqli->simpleQuery("INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...")
#9 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB/DataObject.php(2415): DB_common->query("INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...")
#10 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/packages/DB/DataObject.php(1040): DB_DataObject->_query("INSERT INTO civicrm_mailing_event_bounce (event_queue_id , bounce_type_id , b...")
#11 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/CRM/Core/DAO.php(571): DB_DataObject->insert()
#12 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/CRM/Mailing/Event/BAO/Bounce.php(87): CRM_Core_DAO->save()
#13 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/api/v3/Mailing.php(349): CRM_Mailing_Event_BAO_Bounce::create((Array:7))
#14 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/API/Provider/MagicFunctionProvider.php(100): civicrm_api3_mailing_event_bounce((Array:7))
#15 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/API/Kernel.php(169): Civi\API\Provider\MagicFunctionProvider->invoke((Array:9))
#16 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/API/Kernel.php(100): Civi\API\Kernel->runRequest((Array:9))
#17 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/api/api.php(23): Civi\API\Kernel->runSafe("Mailing", "event_bounce", (Array:6), NULL)
#18 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/CRM/Utils/Mail/EmailProcessor.php(341): civicrm_api("Mailing", "event_bounce", (Array:6))
#19 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/CRM/Utils/Mail/EmailProcessor.php(59): CRM_Utils_Mail_EmailProcessor::_process(TRUE, Object(CRM_Core_DAO_MailSettings), 0)
#20 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/api/v3/Job.php(403): CRM_Utils_Mail_EmailProcessor::processBounces(0)
#21 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/API/Provider/MagicFunctionProvider.php(100): civicrm_api3_job_fetch_bounces((Array:3))
#22 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/API/Kernel.php(169): Civi\API\Provider\MagicFunctionProvider->invoke((Array:9))
#23 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/API/Kernel.php(100): Civi\API\Kernel->runRequest((Array:9))
#24 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/api/api.php(23): Civi\API\Kernel->runSafe("job", "fetch_bounces", (Array:2), NULL)
#25 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/Test/Api3TestTrait.php(262): civicrm_api("job", "fetch_bounces", (Array:2))
#26 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/Civi/Test/Api3TestTrait.php(151): CiviUnitTestCase->civicrm_api("job", "fetch_bounces", (Array:2))
#27 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/tests/phpunit/CRM/Utils/Mail/EmailProcessorTest.php(78): CiviUnitTestCase->callAPISuccess("job", "fetch_bounces", (Array:2))
#28 [internal function](): CRM_Utils_Mail_EmailProcessorTest->testBounceProcessingUTF8mb4()
#29 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/Framework/TestCase.php(1062): ReflectionMethod->invokeArgs(Object(CRM_Utils_Mail_EmailProcessorTest), (Array:0))
#30 /opt/buildkit/build/dmaster/sites/all/modules/civicrm/tests/phpunit/CiviTest/CiviUnitTestCase.php(196): PHPUnit_Framework_TestCase->runTest()
#31 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/Framework/TestCase.php(913): CiviUnitTestCase->runTest()
#32 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/Framework/TestResult.php(686): PHPUnit_Framework_TestCase->runBare()
#33 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/Framework/TestCase.php(868): PHPUnit_Framework_TestResult->run(Object(CRM_Utils_Mail_EmailProcessorTest))
#34 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/Framework/TestSuite.php(733): PHPUnit_Framework_TestCase->run(Object(PHPUnit_Framework_TestResult))
#35 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/TextUI/TestRunner.php(517): PHPUnit_Framework_TestSuite->run(Object(PHPUnit_Framework_TestResult))
#36 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/TextUI/Command.php(186): PHPUnit_TextUI_TestRunner->doRun(Object(PHPUnit_Framework_TestSuite), (Array:54), TRUE)
#37 phar:///opt/buildkit/extern/phpunit5/phpunit5.phar/phpunit/TextUI/Command.php(116): PHPUnit_TextUI_Command->run((Array:11), TRUE)
#38 /opt/buildkit/extern/phpunit5/phpunit5.phar(598): PHPUnit_TextUI_Command::main()
#39 {main}