Welcome to the Splat alpha!

Hi, I ran into the same issue with a simple diff (attached) on 4.0.3.
    if parsed_file.modified_file_details is not None and parsed_file.modified_file_details.endswith(b'(nonexistent)'):

also works for me as a workaround.
This error occurs on linenum=4 started with "@@", just after the first parse of diff header.

The line is not distinguished as "is_diff_header" by the DiffParser class and modified_file_details remains None. However SVNDiffParser tries to invoke modified_file_details.endswith() and results in an AttributeError exception.

As far as I can tell no.

I got the same error with the addition of the attached file to the repository. (created for testing purposes)

It looks like 'modified_file_details' is undefined in this case.

If I comment out the following two lines, I no longer get the error, but obviously this isn't a very good workaround...
590        if parsed_file.modified_file_details.endswith(b'(nonexistent)'):

591            parsed_file.deleted = True

The local path, /data/reviewboard in my case, should have two lables: httpd_sys_content_t for nginx and svirt_sandbox_file_t for access from a contaier. I failed to apply both. Thus just have disabld the selinux completly by changing /etc/selinux/config file. Eventually I would go back and try to enable it again.

Are there any changes in that diff aside from standard modifications to files, deleted files, or newly-introduced files?

Hmm, interesting. There must be a situation our unit tests aren't covering. Wonder what that diff looks like.
We'll get a fix into 4.0.4.

Sorry you had to deal with this.. Yeah, Django/Gunicorn does not serve up static media, so something like nginx is required. The Serving Content docs are intended to cover this, but we need to make some adjustments, as people often miss this.
We'll fix up the sitedir/site issue. Definitely a problem that's probably confused plenty of people.
What did you need to run for SELinux? We can add that to the docs.

Some comments on docu improvement to let others to avoid the same mistakes:

The volume binding in the docker run command should be as <local_path>:/site (site vs. sitedir)
The extra server configuration should be un the top of the page, as in step-by-stel approach css files not available
Extra note on SELinux is required. I failed to allow podman and nginx to access the same directory in parallel and finally have disabled selinux

Sorry for the noise. It was not obvious that static content requires extra web server.

And more info:

2021-07-07 16:44:02 +0000] [60] [DEBUG] GET /static/djblets/js/extensions.min.89cfb166357d.js
Error rendering TemplateHook <rbpowerpack.extension.hooks.LicenseBannerTemplateHook object at 0x7f9b23599bb0>: Reverse for 'powerpack-apply-license' not found. 'powerpack-apply-license' is not a valid view function or pattern name.
Traceback (most recent call last):
  File "/venv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 41, in inner
    response = get_response(request)
  File "/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 249, in _legacy_get_response
    response = self._get_response(request)
  File "/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 172, in _get_response
    resolver_match = resolver.resolve(request.path_info)
  File "/venv/lib/python3.8/site-packages/django/urls/resolvers.py", line 394, in resolve
    raise Resolver404({'tried': tried, 'path': new_path})


No Powerpack is configured.

This is what I see on the console:

[2021-07-07 14:25:03 +0000] [61] [DEBUG] GET /static/djblets/js/datagrid.min.c3b715397200.js
WARNING:django.request:Not Found: /static/djblets/js/datagrid.min.c3b715397200.js


However the file exists:

root@rb-pod:/# ls -l /site/htdocs/static/djblets/js/datagrid.min.c3b715397200.js
-rw-r--r--. 1 root root 9281 Jun 29 08:49 /site/htdocs/static/djblets/js/datagrid.min.c3b715397200.js
root@rb-pod:/# 


Moreover, the direct get from the container returs an error:

root@rb-pod:/# curl -v localhost:8080/static/djblets/js/datagrid.min.c3b715397200.js
*   Trying ::1:8080...
* TCP_NODELAY set
* connect to ::1 port 8080 failed: Connection refused
*   Trying 127.0.0.1:8080...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 8080 (#0)
> GET /static/djblets/js/datagrid.min.c3b715397200.js HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.68.0
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 400 Bad Request
< Server: gunicorn
< Date: Wed, 07 Jul 2021 14:29:39 GMT
< Connection: keep-alive
< Content-Type: text/html
< Vary: Accept-Language
< Content-Language: en
< ETag: "571e88fb6da35fec3989eca6b40f5e20"
< Content-Length: 26
< X-Frame-Options: SAMEORIGIN
< 
* Connection #0 to host localhost left intact
<h1>Bad Request (400)</h1>root@rb-pod:/#