I also see this in the Mir logs:
[2017-10-27 15:30:24.769006] <WARNING> mesa-buffer-allocator: WaylandBuffer::gl_bind_to_texture() called on a destroyed wl_buffer
I also see this in the Mir logs:
[2017-10-27 15:30:24.769006] <WARNING> mesa-buffer- allocator: WaylandBuffer: :gl_bind_ to_texture( ) called on a destroyed wl_buffer