dEQP-VK.wsi.wayland.swapchain.{modify.resize, destroy.old_swapchain} crash
These two tests crashes when calling wl_display_flush()
from wsi_wl_swapchain_chain_free()
: it tries to dereference a NULL pointer.
It happens (at least) in anv and v3d.
Traced the problem to commit 9a00a360