Taken from PR 201330. After talking with xmj@ I think the root cause of the behaviour is a bundler problem. However, this patch seems to fix this just fine so GitLab is starting with it.
Proposed commit message:
www/rubygem-gitlab-grack: patch rack 1.5 dependency PR: 201330 Submitted by: Torsten Zuehlsdorff <ports@toco-domains.de> Approved by: swills (mentor), mat (mentor)