Looks like the nightlies are not properly updated. @mbabker Can you have a look at what may be broken with the script?

This bug is fixed since two weeks with this commit: 842d95b
But in nightly it's indeed still buggy.

Confirmed but with a different error message

Notice: Undefined variable: app in administrator/components/com_content/models/article.php on line 522

Fatal error: Call to a member function enqueueMessage() on a non-object in administrator/components/com_content/models/article.php on line 522

This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/5159.

@brianteeman I see the problem, but I wonder how you got there. That line is triggered when there is no alias specified but the (generated?) alias already existed somehow.
It should show the warning:

Alias already existed so a number was added at the end. You can re-edit the article to customise the alias

I created an article, typed a title and pressed save and close

On 21 November 2014 18:46, Thomas Hunziker notifications@github.com wrote:

@brianteeman https://github.com/brianteeman I see the problem, but I
wonder how you got there. That line is triggered when there is no alias
specified but the (generated?) alias already existed somehow.
It should show the warning:

Alias already existed so a number was added at the end. You can re-edit
the article to customise the alias

—
Reply to this email directly or view it on GitHub
#5159 (comment).

Brian Teeman
Co-founder Joomla! and OpenSourceMatters Inc.
http://brian.teeman.net/

Try this fix: #5160

Looks like Michael has a task to fix the script that does the nightly builds.
So the issue itself is fixed already in staging, but the nightly builds currently are a bit broken.