Comment 68 for bug 1366351

Jerry,

If you still have that crash file, install unity debug symbols (see https://wiki.ubuntu.com/DebuggingProgramCrash#Debug_Symbol_Packages) and do:

apport-unpack /var/crash/_usr_bin_compiz.1000.crash /tmp/unity-crash

Then:
  gdb /usr/bin/compiz /tmp/unity-crash/CoreDump

At this point, do:
  bt full

And post the output here