Firstly, I put multiple bug reports there to show that 'real programmers' are running into real bugs in the wild. This is necessary because otherwise when I point out bugs, I'm dismissed as a "PL fan" whose ivory tower views don't line up with the mainstream. See elsewhere in the comments.

Secondly, if I click into my first link (2015), it says resolved 2015. And by 'resolved' it means 'duplicate but not fixed'. Because when I clicked into its duplicate, it wasn't 'resolved' until 2018. What did they resolve if tickets are still being filed in 2019 and 2021?

The last three are open, open and won't fix. Not so promising for the flatMap method.