I'm preparing a new release of my Vulkan Hardware Capability viewer that uses vkGetPhysicalDeviceFeatures/Properties2KHR to read out additional features and properties for new extensions (when available) and on my Intel Haswell with a recent MESA version (os is Ubuntu 16.04) calling one of these functions always crashes. 

The function pointers are valid, and running these on other devices/operating systems works fine so this may be a driver related problem.

To support the new feature and property functions I do the following:
- Enable "VK_KHR_get_physical_device_properties2" at instance level
- Get function pointers for both functions:

	pfnGetPhysicalDeviceFeatures2KHR = reinterpret_cast<PFN_vkGetPhysicalDeviceFeatures2KHR>(vkGetInstanceProcAddr(vkInstance, "vkGetPhysicalDeviceFeatures2KHR"));
	pfnGetPhysicalDeviceProperties2KHR = reinterpret_cast<PFN_vkGetPhysicalDeviceProperties2KHR>(vkGetInstanceProcAddr(vkInstance, "vkGetPhysicalDeviceProperties2KHR"));

- Both function pointers are valid
- Read out an extension specific feature/property like this:

	if (extensionSupported(VK_KHX_MULTIVIEW_EXTENSION_NAME)) {
		VkPhysicalDeviceFeatures2KHR deviceFeatures2{};
		VkPhysicalDeviceMultiviewFeaturesKHX multiViewFeatures{};
		multiViewFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_FEATURES_KHX;
		deviceFeatures2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2_KHR;
		deviceFeatures2.pNext = &multiViewFeatures;
		pfnGetPhysicalDeviceFeatures2KHR(device, &deviceFeatures2);
		features2.push_back(Feature2("multiview", multiViewFeatures.multiview, VK_KHX_MULTIVIEW_EXTENSION_NAME));
		features2.push_back(Feature2("multiviewGeometryShader", multiViewFeatures.multiviewGeometryShader, VK_KHX_MULTIVIEW_EXTENSION_NAME));
		features2.push_back(Feature2("multiviewTessellationShader", multiViewFeatures.multiviewTessellationShader, VK_KHX_MULTIVIEW_EXTENSION_NAME));
	}

This will always crash at pfnGetPhysicalDeviceFeatures2KHR, same for pfnGetPhysicalDeviceProperties2KHR.