SSI Broken in Apache 2.4.x when Basic Auth is used

Closing on release.

This is the same issue as in the indexing case. The message implicates the same hole in the code that ran assuming the post-read hook would have run. All the hooks now guard themselves and force-create a per-request structure and attendant objects if Apache doesn't do the right things internally.

Feel free to send them to me direct, or in Dropbox or what have you.

I've tested every which way in the past with no problems, so I think I need the exact case to spend more time on it.

Okay the setup is like this:

documentroot is /web/website/htdocs/
The file affected is at /web/website/htdocs/folder/index.html (my developers do not use the .shtml extension for some reason I get around this by using the XBitHack Full statement on sites where they intend to use SSI)

If they try to include a file at say /web/website/htdocs/otherfolder/footer.html it will generate an error like this:
shib_auth_checker found no per-request structure, referer: http://www.website.com/
unable to include "/footer.html" in parsed file /web/website/htdocs/folder/index.html, subrequest setup returned 500, referer: http://www.website.com/

I did run a trace but this was the only thing useful as you suggested.

If you would like non-redacted configs I could provide them, but would rather not put them in an open forum.

<VirtualHost website:80>
ServerName www.website.com
ShibCompatValidUser On
XBitHack Full
DocumentRoot /web/website/htdocs
<Directory /web/website/htdocs>
Options FollowSymlinks Includes
AllowOverride All
Include /web/configs/.htaccess
</Directory>
</VirtualHost>

Please attach complete examples of the configuration affected. A trace probably won't tell me anything, but won't hurt. Apache does no logging of the SSI mechanism, so I get nothing about what it's doing internally.