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JS error on page load
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Description

Visit http://en.m.wikipedia.beta.wmflabs.org/wiki/Barack_Obama?mobileaction=stable

Uncaught TypeError: Cannot read property 'length' of null

initButton @ init.js?054e7:170(anonymous function) @ init.js?054e7:271fire @ load.php?

I'd say this is UBN since it causes a JavaScript error for all users in stable which can break other functionality (for example watch star doesn't work for me).

Should fix before gets on the train!

Related Objects

Event Timeline

Change 301705 had a related patch set uploaded (by Jdlrobson):
legacyBtn can sometimes be null

https://gerrit.wikimedia.org/r/301705

phuedx triaged this task as Unbreak Now! priority.Jul 29 2016, 8:16 AM

Change 301705 merged by jenkins-bot:
legacyBtn can sometimes be null

https://gerrit.wikimedia.org/r/301705

Jhernandez subscribed.

Verified in beta cluster.