Assignee/AssigneeUsername columns incorrect in CSV export when Author and Assignee are the same

Summary

Bugs assigned to the author have a blank assignee column in CSV Export

Steps to reproduce

1. File an issue in Gitlab
2. Assign issue to the author
3. Export CSV and see a blank Assignee column.

Example Project

https://gitlab.com/BooneJS/sample-project-bug-report/issues

My company owns EE licenses, so I don't have a paid license at gitlab.com and cannot create a CSV file.

What is the current bug behavior?

In CSV, Assignee and Assignee Username are both blank

What is the expected correct behavior?

When a bug is assigned to the author, the Assignee and Assignee Username will match the Author and Author Username.

Relevant logs and/or screenshots

I cannot paste logs/screenshots from our EE self-hosted Gitlab instance.

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

$ sudo gitlab-rake gitlab:env:info
System information
System:		Ubuntu 16.04
Proxy:		no
Current User:	git
Using RVM:	no
Ruby Version:	2.3.3p222
Gem Version:	2.6.6
Bundler Version:1.13.7
Rake Version:	12.0.0
Redis Version:	3.2.5
Git Version:	2.13.5
Sidekiq Version:5.0.4
Go Version:	unknown
GitLab information
Version:	9.5.4-ee
Revision:	08803f6
Directory:	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:	postgresql
DB Version:	9.6.3
URL:		https://git.groq.io
HTTP Clone URL:	https://git.groq.io/some-group/some-project.git
SSH Clone URL:	git@git.groq.io:some-group/some-project.git
Elasticsearch:	no
Geo:		no
Using LDAP:	no
Using Omniauth:	yes
Omniauth Providers: saml
GitLab Shell
Version:	5.8.0
Repository storage paths:

• default: /var/opt/gitlab/git-data/repositories Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

$ sudo gitlab-rake gitlab:check SANITIZE=true
Checking GitLab Shell ...
GitLab Shell version >= 5.8.0 ? ... OK (5.8.0)
Repo base directory exists?
default... yes
Repo storage directories are symlinks?
default... no
Repo paths owned by git:root, or git:git?
default... yes
Repo paths access is drwxrws---?
default... yes
hooks directories in repos are links: ...
2/1 ... ok
2/2 ... ok
4/3 ... repository is empty
2/4 ... ok
2/5 ... ok
2/6 ... ok
2/7 ... ok
2/8 ... ok
2/9 ... ok
2/10 ... ok
2/11 ... ok
2/12 ... ok
2/13 ... ok
2/14 ... ok
2/15 ... ok
2/16 ... ok
2/17 ... ok
2/18 ... ok
7/19 ... ok
2/20 ... ok
2/21 ... ok
2/22 ... ok
2/23 ... ok
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Access to /var/opt/gitlab/.ssh/authorized_keys: OK
Send ping to redis server: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Sidekiq ...
Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Reply by email ...
Reply by email is disabled in config/gitlab.yml
Checking Reply by email ... Finished
Checking LDAP ...
LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... no
Try fixing it:
sudo chown -R git /var/opt/gitlab/gitlab-rails/uploads
sudo find /var/opt/gitlab/gitlab-rails/uploads -type f -exec chmod 0644 {} ;
sudo find /var/opt/gitlab/gitlab-rails/uploads -type d -not -path /var/opt/gitlab/gitlab-rails/uploads -exec chmod 0700 {} ;
For more information see:
doc/install/installation.md in section "GitLab"
Please fix the error above and rerun the checks.
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
2/1 ... yes
2/2 ... yes
4/3 ... yes
2/4 ... yes
2/5 ... yes
2/6 ... yes
2/7 ... yes
2/8 ... yes
2/9 ... yes
2/10 ... yes
2/11 ... yes
2/12 ... yes
2/13 ... yes
2/14 ... yes
2/15 ... yes
2/16 ... yes
2/17 ... yes
2/18 ... yes
7/19 ... yes
2/20 ... yes
2/21 ... yes
2/22 ... yes
2/23 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.3.3 ? ... yes (2.3.3)
Git version >= 2.7.3 ? ... yes (2.13.5)
Active users: ... 23
Elasticsearch version 5.1 - 5.3? ... skipped (elasticsearch is disabled)
Checking GitLab ... Finished

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)