layers: Comment for newbies.
diff --git a/layers/mem_tracker.cpp b/layers/mem_tracker.cpp
index eb9e497..d52a886 100644
--- a/layers/mem_tracker.cpp
+++ b/layers/mem_tracker.cpp
@@ -835,6 +835,7 @@
// hook DestroyInstance to remove tableInstanceMap entry
VK_LAYER_EXPORT VkResult VKAPI vkDestroyInstance(VkInstance instance)
{
+ // Grab the key before the instance is destroyed.
dispatch_key key = get_dispatch_key(instance);
VkLayerInstanceDispatchTable *pTable = get_dispatch_table(mem_tracker_instance_table_map, instance);
VkResult res = pTable->DestroyInstance(instance);