• This issue is blocking
• This issue is causing unreasonable pain

As I've written up in https://github.com/dotnet/core-eng/issues/13026, we introduced a threading bug in https://github.com/dotnet/arcade/pull/7310/files that can crash the reporter. It may be difficult to intentionally reproduce this problem since it kind of relies on actually doing the reporting, but we can inspect the code or just revert the lock part of the change and instead just do the "don't let it pass if it doesn't finish" part of the change.