vulkan client vkcube assertion failure.

[stolk]

The good news: lichee pi4a has a vulkan driver.

The bad news: vkcube will refuse to run, due to an assertion failure:

./cube/cube.c:3444: demo_init_vk: Assertion `!err' failed.

debian@lpi4a:~$ vulkaninfo --summary
==========
VULKANINFO
==========

Vulkan Instance Version: 1.0.239


Instance Extensions: count = 10
-------------------------------
VK_EXT_debug_report                    : extension revision 10
VK_EXT_debug_utils                     : extension revision 2
VK_KHR_device_group_creation           : extension revision 1
VK_KHR_external_fence_capabilities     : extension revision 1
VK_KHR_external_memory_capabilities    : extension revision 1
VK_KHR_external_semaphore_capabilities : extension revision 1
VK_KHR_get_physical_device_properties2 : extension revision 2
VK_KHR_get_surface_capabilities2       : extension revision 1
VK_KHR_surface                         : extension revision 25
VK_KHR_wayland_surface                 : extension revision 6

Instance Layers:
----------------

Devices:
========
GPU0:
	apiVersion         = 1.2.177
	driverVersion      = 1.465.636
	vendorID           = 0x1010
	deviceID           = 0x36104182
	deviceType         = PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU
	deviceName         = PowerVR B-Series BXM-4-64
	driverID           = DRIVER_ID_IMAGINATION_PROPRIETARY
	driverName         = PowerVR B-Series Vulkan Driver
	driverInfo         = 1.16@6099580
	conformanceVersion = 1.2.6.0
	deviceUUID         = 33362035-3220-3130-3420-313832000000
	driverUUID         = 36303939-3538-3000-0000-000000000000
debian@lpi4a:~$ vkcube
vkcube: ./cube/cube.c:3444: demo_init_vk: Assertion `!err' failed.
Aborted

Vulkan packages installed:

debian@lpi4a:~$ dpkg --list | grep vulkan
ii  libvulkan1:riscv64                     1.3.239.0-1                       riscv64      Vulkan loader library
ii  mesa-vulkan-drivers:riscv64            1:21.0.1-2revyos2                 riscv64      Mesa Vulkan graphics drivers
ii  vulkan-tools                           1.3.239.0+dfsg1-1                 riscv64      Miscellaneous Vulkan utilities