[DO NOT MERGE] mcomella PR to test TC fixes!

[mcomella]

Pull Request checklist

• This PR includes thorough tests or an explanation of why it does not
• This PR includes a CHANGELOG entry or does not need one
• I have considered adding QA labels on the associated issue (not this PR; qa-ready or qa-denied)

[mcomella]

Things to try (each of these will be done independent from one another):

• Revert commits in v3.10 to upgrade gradle & app/build dependencies (except for a-c)
• Talk with TC team to see if they changed anything that could affect this: nope

N.B.: Daniela has explored many solutions already in #2431.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@eef55eb). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2459   +/-   ##
=========================================
  Coverage          ?   34.95%           
  Complexity        ?      299           
=========================================
  Files             ?      111           
  Lines             ?     3141           
  Branches          ?      418           
=========================================
  Hits              ?     1098           
  Misses            ?     1953           
  Partials          ?       90

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[mcomella]

This has already passed 3 times today (first three exclamation points).

[dnarcese]

Fourth retry for backing out the dependency upgrade timed out on testGeckoDebugUnitTest

[mcomella]

Hey, stop working!

[mcomella]

I pushed git tag v3.3: let's see if a really old revision will trigger the failures.

[mcomella]

It's also possible the a-c upgrade I made with the other dependency upgrades caused the intermittent.

[dnarcese]

Wow 8 minutes! It used to be so fast

[mcomella]

Wow 8 minutes! It used to be so fast

Yeah, wow. I'm going to comment in the unexpectedly slow builds bug: #2463 This will be easy to retrigger!

Also, stop working!

[mcomella]

6 passes and no failures on v3.3. Let's try v3.9.

[mcomella]

v3.9 success count: 5

[mcomella]

Pushing v3.10. Success count: 4? 5? (caveat: 1 TC failed but with failed UI tests)

[mcomella]

Just pushed v3.11: let's see how it goes. Success count: 2, 1 failure.

[mcomella]

v3.11 failed but v3.10 did not: perhaps the change that broke TC is between those commits.

[mcomella]

Interesting: v3.10-LAT4 (which doesn't fork from master, unlike v3.10 which diverges by two commits) is just after the first commit to master that failed: 4641e177. Let's push v3.10-LAT4 to see if we can get it to reproduce.

[mcomella]

GitHub force closed my PR so I'm now working in #2501.