GitLab doesn't load large MR diffs
In both MRs, the diff seems to keep loading forever.
The issue can be diagnosed more quickly by appending
.json to the URL: The response for
https://gitlab.haskell.org/ghc/ghc/merge_requests/963/diffs.json has status code 500.
This might be an instance of this GitLab issue which appears to be fixed upstream.