Comment #4 on issue 3832 by [email protected]: Array variable suddenly
becomes number
https://code.google.com/p/v8/issues/detail?id=3832
This happens when processing real-time updates to the document content.
Updates are received via a Web Socket, and they are batched so that they
are only processed every 500ms. The flow is:
1. Receive update and invoke document.batchUpdate(input)
2. Check that this.updateBatch_ is null
3. If it is null, assign input to this.updateBatch_ and set a timeout for
processing for 500ms later
4. Receive another update
5. Extend this.updateBatch_ with the input
It is at step 5 that the exception happens, but it's possible that
this.updateBatch_ became bogus at step 3.
Your best bet to reproduce is to create a new doc and start editing it
(your own edits will generate Web Socket updates -- I have seen this when
running Quip locally and thus there were no other users to generate
updates). However, having other users editing the doc (even yourself in a
separate tab) will presumably increase the likelihood of this happening.
I've seen this happen with my own account, so I don't think it's specific
to a Quip user (we just don't have a lot of users on the dev or canary
channels). Happy to run Chrome with any additional flags that would track
this down.
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