instance: Log catch favicon errors as warnings

lib/pleroma/instances/instance.ex

@@ -14,6 +14,8 @@ defmodule Pleroma.Instances.Instance do
   import Ecto.Query
   import Ecto.Changeset
 
+  require Logger
+
   schema "instances" do
     field(:host, :string)
     field(:unreachable_since, :naive_datetime_usec)
@@ -146,7 +148,9 @@ defmodule Pleroma.Instances.Instance do
       favicon
     end
   rescue
-    _ -> nil
+    e ->
+      Logger.warn("Instance.get_or_update_favicon(\"#{host}\") error: #{inspect(e)}")
+      nil
   end
 
   defp scrape_favicon(%URI{} = instance_uri) do
@@ -161,14 +165,18 @@ defmodule Pleroma.Instances.Instance do
              |> Floki.attribute("link[rel=icon]", "href")
              |> List.first(),
            favicon <- URI.merge(instance_uri, favicon_rel) |> to_string(),
-           true <- is_binary(favicon),
-           true <- String.length(favicon) <= 255 do
+           true <- is_binary(favicon) do
         favicon
       else
         _ -> nil
       end
     rescue
-      _ -> nil
+      e ->
+        Logger.warn(
+          "Instance.scrape_favicon(\"#{to_string(instance_uri)}\") error: #{inspect(e)}"
+        )
+
+        nil
     end
   end
 end