@Anomie: That patch changed the output of the parser and added an anchor tag in all headings in the content. The tests for the extensions will need to be updated. Should I be cloning all extensions and checking them for tests involving headings? Or is there a list of commonly used extensions that I should be checking first?

The extensions running parser tests will start failing. Hopefully maintainers will amend their parser tests to match the new mediawiki/core contract. You can probably announce it on wikitech-l since people will wonder why their unrelated patch started failing.

In T90018#1052450, @polybuildr wrote:

Should I be cloning all extensions and checking them for tests involving headings?

Well, LabeledSectionTransclusion, CommonsMetadata and Scribunto to start with, as mentioned above?

Or is there a list of commonly used extensions that I should be checking first?

Not sure what "commonly" is, but what's on WMF servers is listed here and here.

In T90018#1052599, @hashar wrote:

The extensions running parser tests will start failing. Hopefully maintainers will amend their parser tests to match the new mediawiki/core contract. You can probably announce it on wikitech-l since people will wonder why their unrelated patch started failing.

It's good for the person breaking things to make the fix when possible, instead of making more work for others.

Why are these extensions' tests not ran as a part of the mediawiki-extensions-hhvm/mediawiki-extensions-zend jobs? These flagged an issue with MobileFrontend that I fixed before it became a problem (https://gerrit.wikimedia.org/r/#/c/191682/). That would be a good long-term solution to these problems.

Change 191880 had a related patch set uploaded (by Polybuildr):
Update parser tests to account for section anchors

https://gerrit.wikimedia.org/r/191880

Patch-For-Review

In T90018#1053140, @matmarex wrote:

Why are these extensions' tests not ran as a part of the mediawiki-extensions-hhvm/mediawiki-extensions-zend jobs? These flagged an issue with MobileFrontend that I fixed before it became a problem (https://gerrit.wikimedia.org/r/#/c/191682/). That would be a good long-term solution to these problems.

The job is still rather experimental. I am looking for a way to ease the addition/removal of extensions participating in those jobs.

Vivek Ghaisas has poke wikitech-l about the parser tests failure: https://lists.wikimedia.org/pipermail/wikitech-l/2015-February/080909.html

We can probably close this bug, or fill sub tasks for each mediawiki extensions having parser tests and verify whether they still pass / amend them.

@hashar, @matmarex has made a request for me to be added to the "recheck" whitelist so that I can run tests on all the extensions. It would be a great help if you could +2 that.

Change 192007 had a related patch set uploaded (by Gergő Tisza):
Check CommonsMetadata tests after I562e437e

https://gerrit.wikimedia.org/r/192007

Patch-For-Review

CommonsMetadata seems fine (which is what I would expect, it has information extraction tests rather than parser tests and you need fairly specific changes to break those).

Change 192007 abandoned by Gergő Tisza:
Check CommonsMetadata tests after I562e437e

https://gerrit.wikimedia.org/r/192007

out of topic

In T90018#1053672, @polybuildr wrote:

@hashar, @matmarex has made a request for me to be added to the "recheck" whitelist so that I can run tests on all the extensions. It would be a great help if you could +2 that.

Has been granted with https://gerrit.wikimedia.org/r/#/c/191885/ :-}

Change 192065 had a related patch set uploaded (by Polybuildr):
Update Scribunto tests after I562e437e

https://gerrit.wikimedia.org/r/192065

Patch-For-Review

Change 191880 merged by jenkins-bot:
Update parser tests to account for section anchors

https://gerrit.wikimedia.org/r/191880

Change 192065 merged by jenkins-bot:
Update Scribunto tests after I562e437e

https://gerrit.wikimedia.org/r/192065

Change 197125 had a related patch set uploaded (by Anomie):
Fix parser tests, again

https://gerrit.wikimedia.org/r/197125

Change 197125 merged by jenkins-bot:
Fix parser tests, again

https://gerrit.wikimedia.org/r/197125

Change 197207 had a related patch set uploaded (by Bartosz Dziewoński):
Update parser tests to account for section anchors, again

https://gerrit.wikimedia.org/r/197207

Sorry, I am a moron, I meant to do this and just totally forgot.

Change 197207 merged by jenkins-bot:
Update parser tests to account for section anchors, again

https://gerrit.wikimedia.org/r/197207

Change 197540 had a related patch set uploaded (by Anomie):
Fix parser tests, YET AGAIN

https://gerrit.wikimedia.org/r/197540

Change 197540 merged by jenkins-bot:
Fix parser tests, YET AGAIN

https://gerrit.wikimedia.org/r/197540