1308487 - mozregression mixes up fromchange and tochange on the autoland branch

Status: RESOLVED WORKSFORME

(Testing :: mozregression, defect)

Description

[Ryan VanderMeulen [:RyanVM]]

I'd noticed that some recent regression reports from Softvision were getting stuck on a mozilla-central merge push without further bisection within that range, even for recent bugs.

I tried bisecting one of those reports myself yesterday and found that it was dying on an autoland push to mozilla-central where it was flipping around the fromchange and tochange arguments in the pushlog (i.e. fromchange=<bad rev>&tochange=<good>), which was of course causing failures trying to get autoland revs to test due to the broken pushlog range. I was able to confirm that manually bisecting with --repo autoland and the proper --good and --bad set worked just fine.

Comment 1

[Ryan VanderMeulen [:RyanVM]]

Bug 1307439 was the one I was bisecting if you want to see the behavior for yourself. You can give it a good/bad range of 2016-09-29 and 2016-10-02 to save time.

Comment 2

[William Lachance (:wlach)]

Paul, do you want to try your hand at investigating this?

Comment 3

[Paul Yang [:pyang] (away)]

I'll check it this week and see we can come out solution. leave ni? for tracking.

Comment 4

[Paul Yang [:pyang] (away)]

Ryan, I tried 'mozregression --repo autoland --good 2016-09-29 --bad 2016-10-02' on ubuntu and can't reproduce it.  Can you help to provide command? thanks.

Comment 5

[Ryan VanderMeulen [:RyanVM]]

The issue was in switching over from bisection on mozilla-central *to* the autoland branch. Adding --repo autoland from the beginning is not part of the steps to reproduce.

Comment 6

[Paul Yang [:pyang] (away)]

Just tried from autoland to mozilla-central and it works.
Will see mozilla-central to autoland later.

Comment 7

[Paul Yang [:pyang] (away)]

environment: ubuntu 64bit ver.16.04

STR
1. mozregression --repo central --good 2016-10-16 --bad 2016-10-17
2. [bad, good] Switching to autoland
3. [good, bad, bad, bad, bad] Switching to m-c
4. [good, good] Switching to inbound
5. Keep typing bad till it stopped

result: displaying https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=96d1b7238832ebf3e7e03053db19a8e557f6ca42&tochange=07276d294e171f5b7b302499049335ac9be58d96

Not seeing problem so far, need more information to clarify.

Comment 8

[Ryan VanderMeulen [:RyanVM]]

Oddly, I can't reproduce either now using the STR from comment 1. Guess I'll call it WFM for now and reopen if it happens again.