mozregression --good 2017-11-29 --bad 2017-11-30
These four lines (which are the most useful thing it can give me):
0:00.88 INFO: Got as far as we can go bisecting nightlies...
0:00.88 INFO: Last good revision: 91fc3a79606bdc7fb43fef12eff7e65b5b84c00e (2017-11-29)
0:00.88 INFO: First bad revision: ea747bb2ffb77d1fd62b5fa6217cbee15b73d31f (2017-11-30)
0:00.88 INFO: Pushlog:
...followed by 55 lines that look like this (abbreviated here) before mozregression quits:
0:00.88 INFO: Switching bisection method to taskcluster
0:00.88 INFO: Getting mozilla-central builds between 91fc3a79606bdc7fb43fef12eff7e65b5b84c00e and ea747bb2ffb77d1fd62b5fa6217cbee15b73d31f
0:03.70 WARNING: Skipping build 91fc3a79606b: Unable to find build info using the taskcluster route 'gecko.v2.mozilla-central.shippable.revision.91fc3a79606bdc7fb43fef12eff7e65b5b84c00e.firefox.linux64-opt'
0:04.06 WARNING: Skipping build ea747bb2ffb7: Unable to find build info using the taskcluster route 'gecko.v2.mozilla-central.shippable.revision.ea747bb2ffb77d1fd62b5fa6217cbee15b73d31f.firefox.linux64-opt'
0:20.39 WARNING: Skipping build 3e14872b31a7: Unable to find build info using the taskcluster route 'gecko.v2.mozilla-central.shippable.revision.3e14872b31a7b1b207605d09b78fbaaf21f1bba7.firefox.linux64-opt'
0:20.43 CRITICAL: First build 91fc3a79606b is missing, but mozregression can't find a build before - so it is excluded, but it could contain the regression!
0:22.92 WARNING: Skipping build a21f4e2ce518: Unable to find build info using the taskcluster route 'gecko.v2.mozilla-
0:44.19 WARNING: Skipping build ba283baf4e98: Unable to find build info using the taskcluster route 'gecko.v2.mozilla-central.shippable.revision.ba283baf4e98aa3a5f45a17981077b98697aa73a.firefox.linux64-opt'
0:44.20 INFO: There are no build artifacts on inbound for these changesets (they are probably too old).
The useful/actionable output should not be buried above 55 lines of warning-spam. Either we should condense the warning spam, or we should reiterate the last-actionable-line at the bottom (e.g. "The best range we got was: Last Good... First bad... Pushlog ..." right before we quit)
There probably (?) shouldn't be the
CRITICAL warning that's quoted in bold above -- I'm not sure what that's about and why it's assessed as CRITICAL. As far as I can tell, this is just a case where we have nightly builds available and we don't have any intermediate builds, and there's nothing "critical" about the absence of intermediate builds.