diff --git a/packages/web/lib/fog/system.class.php b/packages/web/lib/fog/system.class.php
index 0c254cc285..be592f526d 100644
--- a/packages/web/lib/fog/system.class.php
+++ b/packages/web/lib/fog/system.class.php
@@ -53,7 +53,7 @@ private static function _versionCompare()
     public function __construct()
     {
         self::_versionCompare();
-        define('FOG_VERSION', '1.5.10.2294');
+        define('FOG_VERSION', '1.5.10.2301');
         define('FOG_SCHEMA', 282);
         define('FOG_BCACHE_VER', 143);
         define('FOG_CLIENT_VERSION', '0.13.0');
diff --git a/packages/web/lib/plugins/pushbullet/events/imagefail_pushbullet.event.php b/packages/web/lib/plugins/pushbullet/events/imagefail_pushbullet.event.php
index 05c43875c9..02b51264c0 100755
--- a/packages/web/lib/plugins/pushbullet/events/imagefail_pushbullet.event.php
+++ b/packages/web/lib/plugins/pushbullet/events/imagefail_pushbullet.event.php
@@ -63,8 +63,32 @@ public function __construct()
      */
     public function onEvent($event, $data)
     {
-        self::$message = 'This host has failed to image';
-        self::$shortdesc = 'Failed';
+        // TaskError sends the image and the reason FOS gave, and the reason is
+        // the only part of this an admin can act on -- "failed to image" says
+        // nothing the task list did not already show. Read defensively: a
+        // server whose web tree predates that change sends HostName alone, and
+        // reading a missing key would turn the notification into a PHP warning
+        // in an event that only fires when something has already gone wrong.
+        $image = (string) ($data['ImageName'] ?? '');
+        if ('' === $image) {
+            $image = _('an unnamed image');
+        }
+        $reason = (string) ($data['Reason'] ?? '');
+        if ('' === $reason) {
+            $reason = _('no reason was reported');
+        }
+        self::$shortdesc = _('Imaging Failed');
+        // Composed here rather than handed to the base class as a bare
+        // literal, because the substitution has to happen AFTER translation:
+        // a msgid built at runtime matches no catalog entry and never
+        // translates. The base's _() then finds nothing and passes this
+        // through unchanged. Positional specifiers so a translator can
+        // reorder the sentence.
+        self::$message = sprintf(
+            _('This host failed imaging %1$s: %2$s'),
+            $image,
+            $reason
+        );
         parent::onEvent($event, $data);
     }
 }
diff --git a/packages/web/lib/plugins/slack/events/imagefail_slack.event.php b/packages/web/lib/plugins/slack/events/imagefail_slack.event.php
index 1382cbb1b1..b8dbd886f6 100755
--- a/packages/web/lib/plugins/slack/events/imagefail_slack.event.php
+++ b/packages/web/lib/plugins/slack/events/imagefail_slack.event.php
@@ -62,15 +62,32 @@ public function __construct()
      */
     public function onEvent($event, $data)
     {
+        // See the pushbullet listener: the reason is the actionable half of
+        // this notification, and every added key is read defensively so the
+        // plugin keeps working against a web tree that still sends HostName
+        // alone.
+        $image = (string) ($data['ImageName'] ?? '');
+        if ('' === $image) {
+            $image = _('an unnamed image');
+        }
+        $reason = (string) ($data['Reason'] ?? '');
+        if ('' === $reason) {
+            $reason = _('no reason was reported');
+        }
         foreach ((array)self::getClass('SlackManager')
             ->find() as &$Token
         ) {
             $args = array(
                 'channel' => $Token->get('name'),
+                // Whole sentence inside _() with positional specifiers: the
+                // old form put 'Host: %s ' outside the call and translated
+                // the tail on its own, which is not a sentence a translator
+                // can work with.
                 'text' => sprintf(
-                    'Host: %s %s',
+                    _('Host %1$s failed imaging %2$s: %3$s'),
                     $data['HostName'],
-                    _('imaging failed.')
+                    $image,
+                    $reason
                 )
             );
             $Token->call('chat.postMessage', $args);
diff --git a/packages/web/management/languages/de_DE.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/de_DE.UTF-8/LC_MESSAGES/messages.po
index a6a2f91898..7cfabdc255 100644
--- a/packages/web/management/languages/de_DE.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/de_DE.UTF-8/LC_MESSAGES/messages.po
@@ -2536,6 +2536,10 @@ msgstr "Telefonnummer"
 msgid "Host"
 msgstr "Host"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 #, fuzzy
 msgid "Host AD Domain"
 msgstr "Host AD-Domäne"
@@ -3075,6 +3079,10 @@ msgstr "Image Task vollständig"
 msgid "Imaging Duration"
 msgstr "Imaging Log"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "Laden fehlgeschlagen: %s"
+
 msgid "Imaging Log"
 msgstr "Imaging Log"
 
@@ -6595,6 +6603,10 @@ msgstr "Diese Datei funktioniert nur auf Windows"
 msgid "This host already exists"
 msgstr "Dieser Host ist bereits vorhanden."
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "Dieser Host ist bereits vorhanden."
+
 msgid "This installation process may take a few minutes"
 msgstr "Der Installationsprozess kann ein paar Minuten dauern, "
 
@@ -7345,6 +7357,10 @@ msgstr "vor"
 msgid "all current storage nodes"
 msgstr "momentanen Speicherknoten löschen."
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "Ungültiges Image"
+
 msgid "and Mac OS X"
 msgstr "und Mac OS X"
 
@@ -7696,10 +7712,6 @@ msgstr "Images"
 msgid "images to a storage group"
 msgstr "bildet ab zu einer Speichergruppe"
 
-#, fuzzy
-msgid "imaging failed."
-msgstr "Laden fehlgeschlagen: %s"
-
 msgid "in seconds"
 msgstr "in Sekunden"
 
@@ -7845,6 +7857,9 @@ msgstr "nicht verfügbar"
 msgid "no login will appear"
 msgstr "wird kein Login erscheinen."
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "welcher Knoten die Images verteilt."
 
diff --git a/packages/web/management/languages/en_US.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/en_US.UTF-8/LC_MESSAGES/messages.po
index 23c8b0b3e7..4054d58a7d 100644
--- a/packages/web/management/languages/en_US.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/en_US.UTF-8/LC_MESSAGES/messages.po
@@ -2538,6 +2538,10 @@ msgstr "Home Phone"
 msgid "Host"
 msgstr "Host"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 #, fuzzy
 msgid "Host AD Domain"
 msgstr "AD Domain"
@@ -3076,6 +3080,10 @@ msgstr "after task completion"
 msgid "Imaging Duration"
 msgstr "Imaging Log"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "Load failed: %s"
+
 msgid "Imaging Log"
 msgstr "Imaging Log"
 
@@ -6593,6 +6601,10 @@ msgstr ""
 msgid "This host already exists"
 msgstr "Printer already exists"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "Printer already exists"
+
 msgid "This installation process may take a few minutes"
 msgstr ""
 
@@ -7342,6 +7354,10 @@ msgstr " ago"
 msgid "all current storage nodes"
 msgstr "Invalid storage node"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "Invalid image"
+
 msgid "and Mac OS X"
 msgstr ""
 
@@ -7693,10 +7709,6 @@ msgstr "Images"
 msgid "images to a storage group"
 msgstr "Primary Storage Group"
 
-#, fuzzy
-msgid "imaging failed."
-msgstr "Load failed: %s"
-
 msgid "in seconds"
 msgstr ""
 
@@ -7841,6 +7853,9 @@ msgstr "n/a"
 msgid "no login will appear"
 msgstr ""
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr ""
 
diff --git a/packages/web/management/languages/es_ES.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/es_ES.UTF-8/LC_MESSAGES/messages.po
index fd8f05f67d..11853b988d 100755
--- a/packages/web/management/languages/es_ES.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/es_ES.UTF-8/LC_MESSAGES/messages.po
@@ -2530,6 +2530,10 @@ msgstr ""
 msgid "Host"
 msgstr "Equipo"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 #, fuzzy
 msgid "Host AD Domain"
 msgstr "Gestión de equipos"
@@ -3097,6 +3101,10 @@ msgstr "Imagen"
 msgid "Imaging Duration"
 msgstr "Descripción"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "Error al cargar"
+
 msgid "Imaging Log"
 msgstr ""
 
@@ -6578,6 +6586,10 @@ msgstr ""
 msgid "This host already exists"
 msgstr "Ya existe este equipo"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "Ya existe este equipo"
+
 msgid "This installation process may take a few minutes"
 msgstr ""
 
@@ -7294,6 +7306,10 @@ msgstr ""
 msgid "all current storage nodes"
 msgstr "todos los Nodos de Almacenamiento"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "Imagen inválida"
+
 msgid "and Mac OS X"
 msgstr ""
 
@@ -7645,10 +7661,6 @@ msgstr "Imágenes"
 msgid "images to a storage group"
 msgstr "Añadir grupo de almacenamiento"
 
-#, fuzzy
-msgid "imaging failed."
-msgstr "Error al cargar"
-
 msgid "in seconds"
 msgstr ""
 
@@ -7789,6 +7801,9 @@ msgstr ""
 msgid "no login will appear"
 msgstr "Gestión de login"
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "exportar imágenes"
 
diff --git a/packages/web/management/languages/fr_FR.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/fr_FR.UTF-8/LC_MESSAGES/messages.po
index 7c22664610..0a1d71eba2 100644
--- a/packages/web/management/languages/fr_FR.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/fr_FR.UTF-8/LC_MESSAGES/messages.po
@@ -2247,6 +2247,10 @@ msgstr "Téléphone fixe"
 msgid "Host"
 msgstr "Machine"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 msgid "Host AD Domain"
 msgstr "Domaine AD machine"
 
@@ -2722,6 +2726,10 @@ msgstr "Clonage terminé"
 msgid "Imaging Duration"
 msgstr "Durée du clonage"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "La connexion a échoué"
+
 msgid "Imaging Log"
 msgstr "Journal des clonages"
 
@@ -5825,6 +5833,10 @@ msgstr "Ce fichier ne fonctionnera que sous Windows"
 msgid "This host already exists"
 msgstr "Cette machine existe déjà"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "Cette machine existe déjà"
+
 msgid "This installation process may take a few minutes"
 msgstr "Ce processus d'installation peut prendre quelques minutes"
 
@@ -6482,6 +6494,10 @@ msgstr "depuis"
 msgid "all current storage nodes"
 msgstr "tous les nœuds de stockage actuels"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "Image invalide"
+
 msgid "and Mac OS X"
 msgstr "and MacOS X"
 
@@ -6791,10 +6807,6 @@ msgstr "images"
 msgid "images to a storage group"
 msgstr "images vers un groupe de stockage"
 
-#, fuzzy
-msgid "imaging failed."
-msgstr "La connexion a échoué"
-
 msgid "in seconds"
 msgstr "en secondes"
 
@@ -6922,6 +6934,9 @@ msgstr "n/a"
 msgid "no login will appear"
 msgstr "aucun login n'apparaîtra"
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "nœud est le distributeur des images"
 
diff --git a/packages/web/management/languages/it_IT.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/it_IT.UTF-8/LC_MESSAGES/messages.po
index 18b698663b..91b21d0bf8 100644
--- a/packages/web/management/languages/it_IT.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/it_IT.UTF-8/LC_MESSAGES/messages.po
@@ -2305,6 +2305,10 @@ msgstr "Telefono di casa"
 msgid "Host"
 msgstr "Host"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 msgid "Host AD Domain"
 msgstr "Host AD Dominio"
 
@@ -2786,6 +2790,10 @@ msgstr "Attività di immagine completata"
 msgid "Imaging Duration"
 msgstr "Imaging Log"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "Caricamento non riuscito"
+
 msgid "Imaging Log"
 msgstr "Imaging Log"
 
@@ -5947,6 +5955,10 @@ msgstr "Questo file funziona solo in Windows"
 msgid "This host already exists"
 msgstr "Questo host esiste già"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "Questo host esiste già"
+
 msgid "This installation process may take a few minutes"
 msgstr "Questo processo di installazione impiegherà alcuni minuti"
 
@@ -6617,6 +6629,10 @@ msgstr "fa"
 msgid "all current storage nodes"
 msgstr "tutti i nodi di archiviazione attivi"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "immagine non valido"
+
 msgid "and Mac OS X"
 msgstr "e Mac OS X"
 
@@ -6933,10 +6949,6 @@ msgstr "immagini"
 msgid "images to a storage group"
 msgstr "Immagini in un gruppo di archiviazione"
 
-#, fuzzy
-msgid "imaging failed."
-msgstr "Caricamento non riuscito"
-
 msgid "in seconds"
 msgstr "in secondi"
 
@@ -7067,6 +7079,9 @@ msgstr "n/d"
 msgid "no login will appear"
 msgstr "nessun login appare"
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "nodo è il distributore delle immagini"
 
diff --git a/packages/web/management/languages/ja_JP.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/ja_JP.UTF-8/LC_MESSAGES/messages.po
index 1e50fbdd95..4971d455a3 100644
--- a/packages/web/management/languages/ja_JP.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/ja_JP.UTF-8/LC_MESSAGES/messages.po
@@ -2222,6 +2222,10 @@ msgstr "自宅電話番号"
 msgid "Host"
 msgstr "ホスト"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 msgid "Host AD Domain"
 msgstr "ホスト AD ドメイン"
 
@@ -2695,6 +2699,10 @@ msgstr "イメージ処理が完了しました"
 msgid "Imaging Duration"
 msgstr "イメージ処理時間"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "イメージ処理に失敗しました。"
+
 msgid "Imaging Log"
 msgstr "イメージログ"
 
@@ -5769,6 +5777,10 @@ msgstr "このファイルは Windows でのみ使用できます"
 msgid "This host already exists"
 msgstr "このホストは既に存在します"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "このホストは既に存在します"
+
 msgid "This installation process may take a few minutes"
 msgstr "このインストール処理には数分かかる場合があります"
 
@@ -6419,6 +6431,10 @@ msgstr "前"
 msgid "all current storage nodes"
 msgstr "現在のすべてのストレージノード"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "無効なイメージ"
+
 msgid "and Mac OS X"
 msgstr "および Mac OS X"
 
@@ -6725,9 +6741,6 @@ msgstr "イメージ"
 msgid "images to a storage group"
 msgstr "イメージをストレージグループへ"
 
-msgid "imaging failed."
-msgstr "イメージ処理に失敗しました。"
-
 msgid "in seconds"
 msgstr "秒単位"
 
@@ -6854,6 +6867,9 @@ msgstr "N/A"
 msgid "no login will appear"
 msgstr "ログイン画面は表示されません"
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "ノードがイメージの配布元になります"
 
diff --git a/packages/web/management/languages/messages.pot b/packages/web/management/languages/messages.pot
index aff4c39b96..2f603d7665 100644
--- a/packages/web/management/languages/messages.pot
+++ b/packages/web/management/languages/messages.pot
@@ -2205,6 +2205,10 @@ msgstr ""
 msgid "Host"
 msgstr ""
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 msgid "Host AD Domain"
 msgstr ""
 
@@ -2675,6 +2679,9 @@ msgstr ""
 msgid "Imaging Duration"
 msgstr ""
 
+msgid "Imaging Failed"
+msgstr ""
+
 msgid "Imaging Log"
 msgstr ""
 
@@ -5739,6 +5746,10 @@ msgstr ""
 msgid "This host already exists"
 msgstr ""
 
+#, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr ""
+
 msgid "This installation process may take a few minutes"
 msgstr ""
 
@@ -6389,6 +6400,9 @@ msgstr ""
 msgid "all current storage nodes"
 msgstr ""
 
+msgid "an unnamed image"
+msgstr ""
+
 msgid "and Mac OS X"
 msgstr ""
 
@@ -6695,9 +6709,6 @@ msgstr ""
 msgid "images to a storage group"
 msgstr ""
 
-msgid "imaging failed."
-msgstr ""
-
 msgid "in seconds"
 msgstr ""
 
@@ -6824,6 +6835,9 @@ msgstr ""
 msgid "no login will appear"
 msgstr ""
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr ""
 
diff --git a/packages/web/management/languages/pt_BR.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/pt_BR.UTF-8/LC_MESSAGES/messages.po
index 751c4521a3..06d7858ec2 100644
--- a/packages/web/management/languages/pt_BR.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/pt_BR.UTF-8/LC_MESSAGES/messages.po
@@ -2236,6 +2236,10 @@ msgstr "Telefone Residencial"
 msgid "Host"
 msgstr "Host"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 msgid "Host AD Domain"
 msgstr "Domínio AD do Host"
 
@@ -2710,6 +2714,10 @@ msgstr "Criação de Imagem Concluída"
 msgid "Imaging Duration"
 msgstr "Duração da Criação de Imagem"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "criação de imagem falhou."
+
 msgid "Imaging Log"
 msgstr "Log de Criação de Imagem"
 
@@ -5796,6 +5804,10 @@ msgstr "Este arquivo funcionará apenas no Windows"
 msgid "This host already exists"
 msgstr "Este host já existe"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "Este host já existe"
+
 msgid "This installation process may take a few minutes"
 msgstr "Este processo de instalação pode levar alguns minutos"
 
@@ -6447,6 +6459,10 @@ msgstr "atrás"
 msgid "all current storage nodes"
 msgstr "todos os nós de armazenamento atuais"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "Imagem inválida"
+
 msgid "and Mac OS X"
 msgstr "e Mac OS X"
 
@@ -6754,9 +6770,6 @@ msgstr "imagens"
 msgid "images to a storage group"
 msgstr "imagens para um grupo de armazenamento"
 
-msgid "imaging failed."
-msgstr "criação de imagem falhou."
-
 msgid "in seconds"
 msgstr "em segundos"
 
@@ -6883,6 +6896,9 @@ msgstr "n/d"
 msgid "no login will appear"
 msgstr "nenhum login aparecerá"
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "nó é o distribuidor das imagens"
 
diff --git a/packages/web/management/languages/zh_CN.UTF-8/LC_MESSAGES/messages.po b/packages/web/management/languages/zh_CN.UTF-8/LC_MESSAGES/messages.po
index 12ed907735..83d69b761b 100644
--- a/packages/web/management/languages/zh_CN.UTF-8/LC_MESSAGES/messages.po
+++ b/packages/web/management/languages/zh_CN.UTF-8/LC_MESSAGES/messages.po
@@ -2236,6 +2236,10 @@ msgstr "主页电话"
 msgid "Host"
 msgstr "主机"
 
+#, php-format
+msgid "Host %1$s failed imaging %2$s: %3$s"
+msgstr ""
+
 msgid "Host AD Domain"
 msgstr "主机AD域"
 
@@ -2710,6 +2714,10 @@ msgstr "映像已完成"
 msgid "Imaging Duration"
 msgstr "映像期间"
 
+#, fuzzy
+msgid "Imaging Failed"
+msgstr "映像失败"
+
 msgid "Imaging Log"
 msgstr "映像日志"
 
@@ -5796,6 +5804,10 @@ msgstr "这个文件只能在Windows上使用"
 msgid "This host already exists"
 msgstr "主机已经存在"
 
+#, fuzzy, php-format
+msgid "This host failed imaging %1$s: %2$s"
+msgstr "主机已经存在"
+
 msgid "This installation process may take a few minutes"
 msgstr "安装进程将持续几分钟"
 
@@ -6447,6 +6459,10 @@ msgstr "前"
 msgid "all current storage nodes"
 msgstr "所有目前的存储节点"
 
+#, fuzzy
+msgid "an unnamed image"
+msgstr "镜像无效"
+
 msgid "and Mac OS X"
 msgstr "和MAC OS X"
 
@@ -6753,9 +6769,6 @@ msgstr "镜像"
 msgid "images to a storage group"
 msgstr "存储组镜像"
 
-msgid "imaging failed."
-msgstr "映像失败"
-
 msgid "in seconds"
 msgstr "几秒钟内"
 
@@ -6882,6 +6895,9 @@ msgstr "N/A"
 msgid "no login will appear"
 msgstr "不会出现登录"
 
+msgid "no reason was reported"
+msgstr ""
+
 msgid "node is the distributor of the images"
 msgstr "节点是镜像的分发器"
 
diff --git a/tests/imaging-failure-reason.test.php b/tests/imaging-failure-reason.test.php
new file mode 100644
index 0000000000..062ba41aaa
--- /dev/null
+++ b/tests/imaging-failure-reason.test.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * A failure notification must say WHY, and must survive a stale web tree.
+ *
+ * TaskError sends HOST_IMAGE_FAIL with ImageName and Reason (the flattened,
+ * MAX_REASON-bounded opening of what FOS reported). Both bundled listeners
+ * used to ignore all of it and push the fixed string "This host has failed to
+ * image" -- which tells an admin nothing the task list did not already show,
+ * and made the whole stored-report path invisible to anyone not looking at
+ * the server.
+ *
+ * Three things are pinned, and each fails silently rather than loudly:
+ *
+ *   the reason is READ. Dropping it puts the notification back to a fixed
+ *     string and nobody notices, because the push still arrives;
+ *   every added key is read DEFENSIVELY. These events fire only when
+ *     something has already gone wrong, and a web tree can be older than the
+ *     plugin -- `$data['Reason']` on a payload that carries only HostName is
+ *     a PHP warning at the worst possible moment;
+ *   the substitution happens OUTSIDE _(). A msgid built at runtime matches
+ *     no catalog entry, so interpolating into the translated string
+ *     untranslates the whole sentence for every non-English install --
+ *     permanently, and with no error anywhere.
+ *
+ * Source-level: these classes extend the plugin's Event base, which extends
+ * FOG's, so neither loads without a booted FOG, a session and a database.
+ *
+ * Usage: php tests/imaging-failure-reason.test.php
+ * Exit status 0 = pass, 1 = fail.
+ */
+
+$root = dirname(__DIR__) . '/packages/web/lib/plugins';
+
+$fails = [];
+
+$files = [
+    'pushbullet' => $root . '/pushbullet/events/imagefail_pushbullet.event.php',
+    'slack' => $root . '/slack/events/imagefail_slack.event.php'
+];
+
+foreach ($files as $plugin => $file) {
+    if (!is_file($file)) {
+        $fails[] = "$plugin: imagefail listener is missing at $file";
+        continue;
+    }
+    $src = file_get_contents($file);
+    // Comments stripped first, every time: the prose above each of these
+    // changes names the very thing being looked for and would satisfy the
+    // search on its own.
+    $code = preg_replace('#/\*.*?\*/#s', '', $src);
+    $code = preg_replace('#^\s*//.*$#m', '', $code);
+
+    // Scoped to onEvent(), so a mention anywhere else in the file cannot
+    // stand in for the listener actually using it.
+    if (!preg_match('#function onEvent\(.*?\n    \}#s', $code, $m)) {
+        $fails[] = "$plugin: could not read onEvent(), so nothing below is"
+            . ' actually checked';
+        continue;
+    }
+    $fn = $m[0];
+
+    if (false === strpos($fn, "\$data['Reason']")) {
+        $fails[] = "$plugin: the failure notification never reads Reason, so"
+            . ' it says only that imaging failed and not why';
+    }
+    if (false === strpos($fn, "\$data['ImageName']")) {
+        $fails[] = "$plugin: the failure notification never names the image";
+    }
+    // Defensive reads. `?? ''` is the shape; a bare read is the bug.
+    foreach (['Reason', 'ImageName'] as $key) {
+        if (!preg_match(
+            "#\\\$data\['" . $key . "'\]\s*\?\?#",
+            $fn
+        )) {
+            $fails[] = "$plugin: \$data['$key'] is read without a default, so"
+                . ' a server that still sends only HostName turns this'
+                . ' notification into a PHP warning';
+        }
+    }
+    // Both must have a fallback string, or an older server pushes a sentence
+    // with a hole in it ("failed imaging : ").
+    if (!preg_match('#\$reason\s*=\s*_\(#', $fn)
+        || !preg_match('#\$image\s*=\s*_\(#', $fn)
+    ) {
+        $fails[] = "$plugin: a missing key falls through without a translated"
+            . ' placeholder, so the message renders with an empty slot';
+    }
+    // The substitution is outside _(). sprintf(_('...%1$s...'), $x) is right;
+    // _("...$x...") or _('...' . $x) is the bug this pins.
+    if (preg_match('#_\(\s*"[^"]*\$#', $fn)
+        || preg_match("#_\(\s*'[^']*'\s*\.#", $fn)
+    ) {
+        $fails[] = "$plugin: a variable is interpolated INSIDE _(), so the"
+            . ' msgid is built at runtime, matches no catalog entry and never'
+            . ' translates';
+    }
+    if (!preg_match('#sprintf\(\s*\n?\s*_\(#', $fn)) {
+        $fails[] = "$plugin: the message is not composed with sprintf() around"
+            . ' a literal msgid, so the translated sentence cannot carry the'
+            . ' image and the reason';
+    }
+    // Positional specifiers, so a translator can reorder. %s alone locks the
+    // sentence to English word order.
+    if (false === strpos($fn, '%1$s')) {
+        $fails[] = "$plugin: the msgid uses bare %s rather than positional"
+            . ' specifiers, so a translator cannot reorder the sentence';
+    }
+}
+
+if ($fails) {
+    echo 'FAIL: ' . count($fails) . " problem(s):\n";
+    foreach ($fails as $f) {
+        echo "  - $f\n";
+    }
+    exit(1);
+}
+echo "ok: both failure notifications report the reason, defensively\n";
+exit(0);