Attempting to present an image with QueuePresentKHR now crashes with the newest drivers. There are no errors or warnings in the validation layers (SDK 1.1.73 used).
This one is easy to reproduce, just run the cube demo on a GCN1 card (R9 270 in my case). Drivers 18.5.1 and older are not affected by this regression.
P.S For this test I had modified the sample to only run on the AMD card, allowing it to run on GPU1 as my setup has 2 GPUs