Loading `database.yml` fails in `config/bundler_helper.rb` fails with Ruby 3.1 about diaspora HOT 2 CLOSED

Oh dear, nevermind.

This is actually a setup-issue. Archlinux' Ruby package skips stdlib-Gems if they're already packages, and as it turns out, the ruby-psych package for Archlinux is newer than the Psych version included in 3.0. In Ruby 3.0.x, the Psych version is 3.3.2, which is not affected by this.

However, Ruby 3.1 is using Psych 4, and then this script explodes. I'll leave this issue open in relation to #8369 as we'd have to fix that anyway, but I'll adjust it accordingly.

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This is actually a setup-issue.

I was very surprised, as I tested 3.0 a lot and didn't get this problem. I only had this problem with 3.1 (but I didn't have the time yet to dig into it and closer analyze it, so thanks for that 🍪 ).

Alternatively, YAML.load_file(path, aliases: true) would also work in this case. Unfortunately, we can't make this change right now, and would have to wait until we officially drop Ruby 2.7.

That's not true, aliases: true also doesn't work with ruby 3.0, so dropping 2.7 isn't enough to do that. But what we can do after we dropped 2.7 is: YAML.safe_load_file(path, aliases: true), so just use the safe_ variant explicitly.

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