Low impact, still filing it for the records, triggered by somehow accessing /api/feed.query. Only slightly related ticket/commit I could find in upstream (but totally different codepath) is https://we.phorge.it/rP7f6508af5a3d79ddcc7c6e97864794f657315233 / https://secure.phabricator.com/T8599.
See also https://we.phorge.it/rARC7570dd0da119627ff83bc6db3be06b51eb5b366b.
[2024-08-22 17:10:45] EXCEPTION: (DomainException) Attempting to iterate an object (of class PHUIBoxView) which is not iterable. at [<arcanist>/src/object/Phobject.php:62] arcanist(), ava(), phorge(), translations(), wmf-ext-misc() #0 <#2> Phobject::throwOnAttemptedIteration() called at [<arcanist>/src/object/Phobject.php:53] #1 <#2> Phobject::rewind() called at [<arcanist>/src/parser/PhutilJSON.php:63] #2 <#2> PhutilJSON::encodeFormattedObject(PHUIBoxView, integer) called at [<arcanist>/src/parser/PhutilJSON.php:131] #3 <#2> PhutilJSON::encodeFormattedValue(PHUIBoxView, integer) called at [<arcanist>/src/parser/PhutilJSON.php:67] #4 <#2> PhutilJSON::encodeFormattedObject(array, integer) called at [<arcanist>/src/parser/PhutilJSON.php:23] #5 <#2> PhutilJSON::encodeFormatted(array) called at [<phorge>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:616] #6 <#2> PhabricatorConduitAPIController::renderAPIValue(array) called at [<phorge>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:555] #7 <#2> PhabricatorConduitAPIController::buildHumanReadableResponse(string, ConduitAPIRequest, array, FeedQueryConduitAPIMethod) called at [<phorge>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:139] #8 <#2> PhabricatorConduitAPIController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284] #9 phlog(DomainException) called at [<phorge>/src/aphront/handler/PhabricatorDefaultRequestExceptionHandler.php:41] #10 PhabricatorDefaultRequestExceptionHandler::handleRequestThrowable(AphrontRequest, DomainException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:751] #11 AphrontApplicationConfiguration::handleThrowable(DomainException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:296] #12 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:204] #13 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phorge>/webroot/index.php:35]
[2024-08-22 08:49:21] EXCEPTION: (DomainException) Attempting to iterate an object (of class PhutilSafeHTML) which is not iterable. at [<arcanist>/src/object/Phobject.php:62] arcanist(), ava(), phorge(), translations(), wmf-ext-misc() #0 <#2> Phobject::throwOnAttemptedIteration() called at [<arcanist>/src/object/Phobject.php:53] #1 <#2> Phobject::rewind() called at [<arcanist>/src/parser/PhutilJSON.php:63] #2 <#2> PhutilJSON::encodeFormattedObject(PhutilSafeHTML, integer) called at [<arcanist>/src/parser/PhutilJSON.php:131] #3 <#2> PhutilJSON::encodeFormattedObject(array, integer) called at [<arcanist>/src/parser/PhutilJSON.php:128] #4 <#2> PhutilJSON::encodeFormattedValue(array, integer) called at [<arcanist>/src/parser/PhutilJSON.php:67] #5 <#2> PhutilJSON::encodeFormattedObject(array, integer) called at [<arcanist>/src/parser/PhutilJSON.php:23] #6 <#2> PhutilJSON::encodeFormatted(array) called at [<phorge>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:616] #7 <#2> PhabricatorConduitAPIController::renderAPIValue(array) called at [<phorge>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:555] #8 <#2> PhabricatorConduitAPIController::buildHumanReadableResponse(string, ConduitAPIRequest, array, FeedQueryConduitAPIMethod) called at [<phorge>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:139] #9 <#2> PhabricatorConduitAPIController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284] #10 phlog(DomainException) called at [<phorge>/src/aphront/handler/PhabricatorDefaultRequestExceptionHandler.php:41] #11 PhabricatorDefaultRequestExceptionHandler::handleRequestThrowable(AphrontRequest, DomainException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:751] #12 AphrontApplicationConfiguration::handleThrowable(DomainException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:296] #13 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:204] #14 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phorge>/webroot/index.php:35]