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The side by side diff in bitbucket seems to be broken, where seeing a lot "Undefined" looks like its near braces { { where the changes have happened you get lines of UNDEFINED as below 

Also as i'm on the free plan you can't submit a bug report to tell someone at atlassian.








5 answers

I have the same problem. It has started recently.


It's more than six months. It's still broken.

0 votes
Caroline R Atlassian Team Jul 15, 2021

Hi, @Martin Richards, @Mike Stainsby, and @kenjihino!

The Dev team confirmed this behavior is a bug. We have it reported on our public site, please follow the link below to sign up to watch the updates for it: 

As a workaround, until the issue is fixed, I would suggest using the normal view instead of the side-by-side diff view.

Please consider adding yourself as a watcher, this way you get updated as we make progress with this. If you are not familiar with our Bug Request Policy, you can read more about it here.

If you have any further questions or concerns, let me know! 

Kind regards,

we have created a public repo to illustrate the issue and commented on the bug report

Like Caroline R likes this

Hi Caroline R,

If we go to a paid account would we be able to get this bug fixed quicker?

Its really affecting our workflow.


Caroline R Atlassian Team Jul 28, 2021

Hi, Martin. 

This wouldn't change the time for the dev team to fix this issue. Atlassian seeks to target the most critical bugs affecting the widest customer set. Bugs are prioritized based on the estimated impact to Atlassian users. 

In case you would like to read more about the bug fix workflow, you can access this link: 

Please don't hesitate to ask for any further information if needed. 

Kind regards,

I'm also experiencing the same issue (screenshot attached). It's been happening for about a week or so now.

Also, the diff's are extremely slow to load (if they load at all), which is also a recent change.

I really hope you can fix the issue, as it's making the Diff's fairly useless, and they are an essential part of our working procedures.


Mike Stainsby


0 votes
Caroline R Atlassian Team Jul 08, 2021

Hi, @Martin Richards.

I haven't been able to reproduce this behavior, I tried testing this in one of my repos and the side-by-side diff is working as expected.

In this case, I would like to ask if you could provide us a screenshot of the error you are facing, but without the URL and any personal information, so we can further investigate this issue. 

Please, feel free to share any additional information regarding this case.

Kind regards,

To confirm exact same issue as @kenjihino our suspicion is something to do with line feeds.





nah. I've been using this feature for years and never had this problem before until recently. I really like this feature. I hope they fix the problem soon.

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