I'm working with (mostly) the standard Fedora 18 packages for wayland/weston.

mesa-dri-drivers-9.0.3-1.fc18.x86_64
mesa-libEGL-9.0.3-1.fc18.x86_64
mesa-libwayland-egl-9.0.3-1.fc18.x86_64

1. Rebuild wayland (to get an updated libwayland-client, otherwise it crashes when connecting to the display, not necessary on rawhide apparently)
2. Rebuild cogl with wayland support (add --enable-wayland-egl-platform to the configure args)
3. Run weston &
4. Run this simple cogl example:
COGL_RENDERER=egl_wayland libtool --mode=execute gdb --args ./examples/cogl-crate

Program received signal SIGFPE, Arithmetic exception.
0x00007ffff4952a7c in eg_surface_init_2d (surf_man=surf_man@entry=0x6211f0, surf=surf@entry=0x7d00c0, level=level@entry=0x7fffffffb870, bpe=bpe@entry=1, tile_split=0, offset=1310720, start_level=0) at radeon_surface.c:646
646	        slice_pt = tileb / tile_split;
(gdb) bt
#0  0x00007ffff4952a7c in eg_surface_init_2d (surf_man=surf_man@entry=0x6211f0, surf=surf@entry=0x7d00c0, level=level@entry=0x7fffffffb870, bpe=bpe@entry=1, tile_split=0, offset=1310720, start_level=0) at radeon_surface.c:646
#1  0x00007ffff4952dfb in eg_surface_init_2d_miptrees (surf_man=0x6211f0, surf=0x7d00c0) at radeon_surface.c:802
#2  0x00007ffff4bc1cd8 in r600_setup_surface (pitch_in_bytes_override=2560, rtex=0x7d0000, screen=0x621250) at r600_texture.c:169
#3  r600_texture_create_object (screen=screen@entry=0x621250, base=base@entry=0x7fffffffcc20, pitch_in_bytes_override=2560, buf=buf@entry=0x7cff70, alloc_bo=alloc_bo@entry=0 '\000', surface=surface@entry=0x7fffffffbf20) at r600_texture.c:406
#4  0x00007ffff4bc21ae in r600_texture_from_handle (screen=0x621250, templ=0x7fffffffcc20, whandle=<optimized out>) at r600_texture.c:556
#5  0x00007ffff4be6ca3 in dri2_drawable_process_buffers (count=2, buffers=0x74f140, drawable=0x757980) at dri2.c:280
#6  dri2_allocate_textures (drawable=0x757980, statts=<optimized out>, count=<optimized out>) at dri2.c:391
#7  0x00007ffff4be7f80 in dri_st_framebuffer_validate (stfbi=<optimized out>, statts=0x7cc930, count=2, out=0x7fffffffcd20) at dri_drawable.c:78
#8  0x00007ffff4bec776 in st_framebuffer_validate (stfb=0x7cc4f0, st=0x6dfb10, st=0x6dfb10) at ../../src/mesa/state_tracker/st_manager.c:195
#9  0x00007ffff4bed9d3 in st_api_make_current (stapi=<optimized out>, stctxi=0x6dfb10, stdrawi=<optimized out>, streadi=<optimized out>) at ../../src/mesa/state_tracker/st_manager.c:734
#10 0x00007ffff4be775a in dri_make_current (cPriv=<optimized out>, driDrawPriv=0x74f2e0, driReadPriv=0x74f2e0) at dri_context.c:243
#11 0x00007ffff4bb4ec6 in driBindContext (pcp=<optimized out>, pdp=<optimized out>, prp=<optimized out>) at ../../../../src/mesa/drivers/dri/common/dri_util.c:381
#12 0x00007ffff6d0e29c in dri2_make_current (drv=0x619750, disp=0x618a10, dsurf=0x74f0c0, rsurf=0x74f0c0, ctx=0x624f20) at egl_dri2.c:916
#13 0x00007ffff6d04bf9 in eglMakeCurrent (dpy=0x618a10, draw=0x74f0c0, read=0x74f0c0, ctx=0x624f20) at eglapi.c:498
#14 0x00007ffff7dc27ec in _cogl_winsys_egl_make_current (display=0x624e30, draw=0x74f0c0, read=0x74f0c0, context=0x624f20) at ./winsys/cogl-winsys-egl.c:279
#15 0x00007ffff7dc340a in bind_onscreen_with_context (onscreen=0x75a030, egl_context=0x624f20) at ./winsys/cogl-winsys-egl.c:673
#16 0x00007ffff7dc34b4 in bind_onscreen (onscreen=0x75a030) at ./winsys/cogl-winsys-egl.c:698
#17 0x00007ffff7dc34ce in _cogl_winsys_onscreen_bind (onscreen=0x75a030) at ./winsys/cogl-winsys-egl.c:704
#18 0x00007ffff7d3e90e in _cogl_framebuffer_gl_bind (framebuffer=0x75a030, target=36160) at ./driver/gl/cogl-framebuffer-gl.c:246
#19 0x00007ffff7d3eb0b in _cogl_framebuffer_gl_flush_state (draw_buffer=0x75a030, read_buffer=0x75a030, 
    state=(COGL_FRAMEBUFFER_STATE_BIND | COGL_FRAMEBUFFER_STATE_VIEWPORT | COGL_FRAMEBUFFER_STATE_CLIP | COGL_FRAMEBUFFER_STATE_DITHER | COGL_FRAMEBUFFER_STATE_MODELVIEW | COGL_FRAMEBUFFER_STATE_PROJECTION | COGL_FRAMEBUFFER_STATE_COLOR_MASK | COGL_FRAMEBUFFER_STATE_FRONT_FACE_WINDING)) at ./driver/gl/cogl-framebuffer-gl.c:321
#20 0x00007ffff7dacb04 in _cogl_framebuffer_flush_state (draw_buffer=0x75a030, read_buffer=0x75a030, 
    state=(COGL_FRAMEBUFFER_STATE_BIND | COGL_FRAMEBUFFER_STATE_VIEWPORT | COGL_FRAMEBUFFER_STATE_CLIP | COGL_FRAMEBUFFER_STATE_DITHER | COGL_FRAMEBUFFER_STATE_MODELVIEW | COGL_FRAMEBUFFER_STATE_PROJECTION | COGL_FRAMEBUFFER_STATE_COLOR_MASK | COGL_FRAMEBUFFER_STATE_FRONT_FACE_WINDING)) at ./cogl-framebuffer.c:1144
#21 0x00007ffff7dab4eb in cogl_framebuffer_clear4f (framebuffer=0x75a030, buffers=3, red=0, green=0, blue=0, alpha=1) at ./cogl-framebuffer.c:369
#22 0x0000000000401b05 in paint (data=0x7fffffffd260) at cogl-crate.c:87
#23 0x0000000000402172 in main (argc=1, argv=0x7fffffffd498) at cogl-crate.c:285
(gdb) list
641	    tileh = 8;
642	    tileb = tilew * tileh * bpe * surf->nsamples;
643	    /* slices per tile */
644	    slice_pt = 1;
645	    if (tileb > tile_split) {
646	        slice_pt = tileb / tile_split;
647	    }
648	    tileb = tileb / slice_pt;
649	
650	    /* macro tile width & height */

Device is:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Madison [Radeon HD 5000M Series] [1002:68c1]