Operating system: Ubuntu 18.10
Graphics card: NVidia GeForce GTX 680
Broken: After e5a1a9288c66ce218a03abf7666336a39ba03b8f ("Fix T60320: Cycles OpenCL denoising filter errors on some drivers")
Worked: Before e5a1a9288c66ce218a03abf7666336a39ba03b8f
Short description of error
Every tile rendered by GPU is black after denoising. Tiles rendered by CPU remain visible after denoising.
Exact steps for others to reproduce the error
Without denoising, everything is OK. If denoising is enabled, every tile rendered by GPU turns black after denoising. Even default cube scene is affected.