apport-retrace recombines an Apport crash report (either a file or a
 Launchpad bug) and debug symbol packages (.ddebs) into fully symbolic
 stack traces. This can optionally use a sandbox for installing debug symbol
 packages and doing the processing, so that entire process of retracing crashes
 can happen with normal user privileges without changing the system.
 .
 You need to install gdb-multiarch if you want to be able to retrace crash
 reports which happened on a different architecture than the one you run
 apport-retrace on.