Fix #4657: Hentai-Foundry: Document tree depth limit exceeded.

app/logical/danbooru/http/html_adapter.rb

@@ -5,7 +5,7 @@ module Danbooru
       HTTP::MimeType.register_alias "text/html", :html
 
       def decode(str)
-        Nokogiri::HTML5(str)
+        Nokogiri::HTML5(str, max_tree_depth: -1)
       end
     end
   end

test/unit/sources/hentai_foundry_test.rb

@@ -102,5 +102,12 @@ module Sources
         assert_equal(bad_source, Sources::Strategies.normalize_source(bad_source))
       end
     end
+
+    context "a post with a deeply nested commentary" do
+      should "work" do
+        @source = Sources::Strategies.find("https://hentai-foundry.com/pictures/user/LumiNyu/867562/Mona-patreon-winner")
+        assert_nothing_raised { @source.to_h }
+      end
+    end
   end
 end