Comment 1 by jteh on 2014-09-12 04:32
This is due to the fact that row 3 is completely empty; i.e. it doesn't contain any cells at all:

<tr style="height:5px"></tr>

Therefore, when we go looking for a cell in row 3, we fail. I'd argue this is bad authoring, but that's the world we live in. :)

The obvious fix is to try further rows, but this could be pretty inefficient.

Comment 2 by Q on 2014-09-12 05:20
I'd prefer it take a long time to it not working at all, but if that won't work, are there any other alternatives?
Can we get an explicit count of rows and columns in each row, use that to detect if we're at the end so that's not slow, and otherwise go searching?

Comment 3 by jteh (in reply to comment 2) on 2014-09-12 05:44
Replying to Q:

I'd prefer it take a long time to it not working at all

My concern isn't that this specific case might take a long time, but that the change might cause tables overall to slow down. In other words, I'm happy for poor authoring to suffer, but I don't want everything else to suffer to compensate for poor authoring.

I'll see what I can come up with when I get some time. If you/someone else wants to poke at this, I can provide a quick brain dump on where to start.

Comment 4 by jteh on 2014-09-12 05:45
Assigning to me for now so this doesn't get lost forever again.

@jcsteh notes in #2362 (comment) - "I'll see what I can come up with when I get some time. If you/someone else wants to poke at this, I can provide a quick brain dump on where to start." Could you please do one of the above and share your thoughts?

Fixed by #7410. CC @ctoth.