Comment 1 for bug 1506971

Looking at the ubuntu-release-upgrader package hook there is the following code:

48 if problem_type == 'Crash':
 49 tmpdir = re.compile('ubuntu-release-upgrader-\w+')
 50 tb = report.get("Traceback", None)
 51 if tb:
 52 dupe_sig = ''
 53 for line in tb.splitlines():
 54 scrub_line = tmpdir.sub('ubuntu-release-upgrader-tmpdir', line)
 55 dupe_sig += scrub_line + '\n'
 56 report["DuplicateSignature"] = dupe_sig

There is nothing abnormal there, scrubbing is just to replace the tmp path in which the ubuntu-release-upgrader ones with one that is generic enough so that upgrades from different systems will have not a unique path in the traceback.