#0  meta_workspace_list_windows (workspace=0x0) at core/workspace.c:745
  [Error: core/workspace.c was not found in source tree]
#1  0xb72f49c8 in window_would_be_covered (newbie=0x8d87988) at core/window.c:2816
  [Error: core/window.c was not found in source tree]
#2  meta_window_show (window=0x8d87988) at core/window.c:3000
  [Error: core/window.c was not found in source tree]
#3  implement_showing (window=0x8d87988, showing=showing@entry=1) at core/window.c:2259
  [Error: core/window.c was not found in source tree]
#4  0xb72f5bad in idle_calc_showing (data=0x0) at core/window.c:2371
  [Error: core/window.c was not found in source tree]
#5  0xb72e8514 in run_repaint_laters (data=0x0) at core/util.c:821
  [Error: core/util.c was not found in source tree]
#6  0xb6c630ed in _clutter_run_repaint_functions (flags=flags@entry=CLUTTER_REPAINT_FLAGS_PRE_PAINT) at ./clutter-main.c:3715
  [Error: ./clutter-main.c was not found in source tree]
#7  0xb6c6396c in master_clock_update_stages (master_clock=0x85aa6f0, stages=0x985bb90) at ./clutter-master-clock.c:451
  [Error: ./clutter-master-clock.c was not found in source tree]
#8  clutter_clock_dispatch (source=0x85c10b0, callback=0x0, user_data=0x0) at ./clutter-master-clock.c:589
  [Error: ./clutter-master-clock.c was not found in source tree]
#9  0xb694a84e in g_key_file_remove_key (key_file=0x98d0540, group_name=0xa <Address 0xa out of bounds>, key=0x0, error=0xb6a07000) at /build/buildd/glib2.0-2.36.3/./glib/gkeyfile.c:3919
  [Error: /build/buildd/glib2.0-2.36.3/./glib/gkeyfile.c was not found in source tree]
#10 0x00000000 in ?? ()