When calling vkUpdateDescriptorSets with any VkCopyDescriptorSet, no copies seem to be performed. Binding the destination sets produces no errors, but no resources get bound.
This can be easily reproduced in the cube demo of the VulkanSDK (version 1.0.13). The modified source can be found in this Gist.
This was tested on
- Sapphire R9 270x, Windows 10, driver package 16.20 and
- an APU, Windows 7, driver package 16.15, as well as Linux
It behaves as exprected on various GPUs of other vendors.