Fix rendering conversations when there's a malformed status

CHANGELOG.md

@@ -3,6 +3,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [1.1.6] - 2019-11-19
+## Fixed
+- Mastodon API: conversations API crashing when one status is malformed
+
 ## [1.1.5] - 2019-11-09
 ### Fixed
 - Polls having different numbers in timelines/notifications/poll api endpoints due to cache desyncronization

lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex

@@ -1671,9 +1671,10 @@ def conversations(%{assigns: %{user: user}} = conn, params) do
     participations = Participation.for_user_with_last_activity_id(user, params)
 
     conversations =
-      Enum.map(participations, fn participation ->
-        ConversationView.render("participation.json", %{participation: participation, for: user})
-      end)
+      ConversationView.safe_render_many(participations, ConversationView, "participation.json", %{
+        as: :participation,
+        for: user
+      })
 
     conn
     |> add_link_headers(:conversations, participations)