BuddyPress Trac tickets with IDs lower than 856 do not open.

[DJPaul]

"Trac detected an internal error: AttributeError: 'NoneType' object has no attribute 'lower'"

Broken: ​https://buddypress.trac.wordpress.org/ticket/855
Working: ​https://buddypress.trac.wordpress.org/ticket/856

[netweb]

Here's some more sample tickets, some work, some do not:
​https://buddypress.trac.wordpress.org/ticket/854 works
​https://buddypress.trac.wordpress.org/ticket/853 does not work
​https://buddypress.trac.wordpress.org/ticket/852 works
​https://buddypress.trac.wordpress.org/ticket/851 does not work
​https://buddypress.trac.wordpress.org/ticket/850 does not work
​https://buddypress.trac.wordpress.org/ticket/849 works
​https://buddypress.trac.wordpress.org/ticket/848 does not work
​https://buddypress.trac.wordpress.org/ticket/847 works
...
​https://buddypress.trac.wordpress.org/ticket/817 works
​https://buddypress.trac.wordpress.org/ticket/816 does not work
​https://buddypress.trac.wordpress.org/ticket/815 does not work
...

​https://buddypress.trac.wordpress.org/ticket/715 works
​https://buddypress.trac.wordpress.org/ticket/714 does not work
​https://buddypress.trac.wordpress.org/ticket/713 does not work
​https://buddypress.trac.wordpress.org/ticket/712 does not work
​https://buddypress.trac.wordpress.org/ticket/711 does not work
​https://buddypress.trac.wordpress.org/ticket/710 does not work
​https://buddypress.trac.wordpress.org/ticket/709 does not work
...
​https://buddypress.trac.wordpress.org/ticket/608 does not work

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In the error message is this:

To that end, you could ​Create a ticket.

Which results in:

Request-URI Too Large: The requested URL's length exceeds the capacity limit for this server.

That "Create" link above is 11,953 characters long and is attempting to create a ticket with some browser debug info such as my Trac username, Browser Agent, even includes wporg_sanitize_user_nicename in that link ¯\_(ツ)_/¯

[slaFFik]

Not all tickets below 856 are broken. Some are working just fine, like these:

​https://buddypress.trac.wordpress.org/ticket/4
​https://buddypress.trac.wordpress.org/ticket/5
​https://buddypress.trac.wordpress.org/ticket/6
​https://buddypress.trac.wordpress.org/ticket/7

etc

[slaFFik]

Based on the error text, perhaps those tickets were created by already deleted user? So change.author variable doesn't have required content, and thus - template is breaking.
Not sure, just a suggestion.

This issues hugely prevents us from cleaning up the BuddyPress trac. Would be really nice to have it fixed.

[nacin]

In 3736:

Trac: Catch exception that appears to be caused by anonymous users. fixes #1759.