Control: tags -1 upstream patch This is because Vulkan handles are always 64-bit, even when pointers aren't: https://sources.debian.org/src/vulkan-loader/1.3.296.0-1/vulkan-headers/include/vulkan/vulkan_core.h/#L29
Hence, the fix is to use VK_NULL_HANDLE not plain NULL: https://salsa.debian.org/xrdesktop-team/gulkan/-/merge_requests/1Upstream appear to have the same issue (though I haven't actually tested this).