CustomApplicationEvent.cs

using Examine;
using Umbraco.Core;

namespace Application.Events
{
    public class CustomApplicationEvent : ApplicationEventHandler
    {
        public CustomApplicationEvent()
        {
            ExamineManager.Instance.IndexProviderCollection["CustomIndexer"].GatheringNodeData
                += OnGatheringNodeData;
        }

        private static void OnGatheringNodeData(object sender, IndexingNodeDataEventArgs e)
        {
        }
    }
}

After upgrading to v7.2, line 10 falls over with an exception of "Resolution is not frozen, it is not yet possible to get values from it". Commenting out line 10 and 11 allows the application to start up correctly.