I've been trying to debug this a little bit.  It's worth noting that this crash
occurs for Apostolos when running weston-simple-egl under weston as well (which
removes Enlightenment and EFL from the equation)

At one point I thought we'd tracked this to create_wl_buffer() failing because
queryImage() on this revision hardware doesn't support
__DRI_IMAGE_ATTRIB_FOURCC, and I wrote a patch to test that theory.  However
recent attempts to debug this against git master seem to indicate that it's not
even getting to create_wl_buffer() before segfaulting anymore.

Unfortunately, I don't have the hardware myself, so my ability to help is
somewhat limited.

It's probably worth noting that the wayland compositor (weston or
enlightenment) starts and renders with egl, but clients - including the trivial
egl demo clients provided with weston crash with a segmentation fault before
displaying a single frame.