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From: Maximilian Stein <m@steiny.biz>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: gitlab: failed to fetch comments in merge requests (500 Internal
 Server Error)
Message-ID: <166315046483.2366206.13573189167668331506.reportbug@mia>
X-Mailer: reportbug 11.5.1
Date: Wed, 14 Sep 2022 12:14:24 +0200
Delivered-To: submit@bugs.debian.org

Package: gitlab
Version: 15.3.2+ds1-1~fto11+1
Severity: normal

Dear Maintainer,

Some time after upgrading to 15.3.2 (but not from the beginning),
loading of comments in merge requests started to fail. This sounds
similar to #1019403, but I believe it is a different issue.

While loading a merge request with comments, this URI (relative to
project) fails:

    -/merge_requests/346/discussions.json?per_page=20

In the production.log, I found:

    Completed 500 Internal Server Error in 764ms (ActiveRecord: 493.9ms | Elasticsearch: 0.0ms | Allocations: 144723)

    Psych::DisallowedClass (Tried to load unspecified class: Gitlab::Diff::Position):

    app/models/diff_discussion.rb:13:in `position'
    app/models/diff_discussion.rb:51:in `cache_key'
    app/controllers/concerns/issuable_actions.rb:186:in `render_mr_discussions'


Unfortunately, I haven't found a workaround yet. Do you have any idea
how to get comments in merge requests again?

Best,
Maximilian
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