I attempted to update lib/config/baseconfig/enwiki.json to the latest version on en.wikipedia.org, using tools/sync-baseconfig.js (see https://gerrit.wikimedia.org/r/334170 ). I got a bunch of errors when running parserTests, like:
19:10:02 [error][enwiki/Main Page] data-mw missing in: <span typeof="mw:Extension/indicator" about="#mwt1"><indicator name=" "></indicator></span> 19:10:02 Stack: 19:10:02 MWParserEnvironment.log (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/bin/parserTests.js:1743:25) 19:10:02 Object.<anonymous> (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/lib/html2wt/DOMHandlers.js:1446:10) 19:10:02 /home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/prfun/lib/index.js:576:26 19:10:02 tryCatch2 (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/babybird/lib/promise.js:48:12) 19:10:02 PrFunPromise.Promise (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/babybird/lib/promise.js:458:15) 19:10:02 new PrFunPromise (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/prfun/lib/index.js:101:21) 19:10:02 /home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/prfun/lib/index.js:574:18 19:10:02 tryCatch1 (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/babybird/lib/promise.js:40:12) 19:10:02 promiseReactionJob (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/babybird/lib/promise.js:269:19) 19:10:02 PromiseReactionJobTask.call (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/babybird/lib/promise.js:284:3) 19:10:02 flush (/home/jenkins/workspace/parsoidsvc-source-npm-node-6-jessie/node_modules/asap/raw.js:50:29) 19:10:02 _combinedTickCallback (internal/process/next_tick.js:67:7) 19:10:02 process._tickCallback (internal/process/next_tick.js:98:9)
This seems to be because the new enwiki.json adds <indicator> to the extensiontags clause.
(There are also some failures because enwiki.json reorders thumbnail after thumb in img_thumbnail (but not in img_manualthumb!). That can be a separate task: T156296.