Intermittend fd_in_limits test failure on rr CI #58979
Description
Open fds are:
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 41 -> pipe:[3474816487]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 42 -> pipe:[3474816488]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 43 -> pipe:[3474816488]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 44 -> /proc/517/pagemap
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 45 -> pipe:[3474816489]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 46 -> pipe:[3474816489]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 47 -> /proc/521/pagemap
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 48 -> pipe:[3474816490]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 49 -> pipe:[3474816490]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 00:47 5 -> anon_inode:[eventpoll]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 50 -> pipe:[3474816491]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 51 -> pipe:[3474816491]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 52 -> socket:[3474816492]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 53 -> /proc/524/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 54 -> socket:[3474816493]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 55 -> socket:[3474816494]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 56 -> socket:[3474816495]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 57 -> /proc/525/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 58 -> socket:[3474816496]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 59 -> /proc/526/pagemap
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 6 -> pipe:[3474633912]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 60 -> socket:[3474816497]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 61 -> socket:[3474816498]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 62 -> pipe:[3474655411]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 63 -> pipe:[3474655405]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 64 -> socket:[3474816499]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 65 -> socket:[3474816500]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 66 -> socket:[3474816501]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 67 -> /proc/531/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 68 -> socket:[3474816502]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 69 -> socket:[3474816503]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 00:47 7 -> pipe:[3474642323]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 70 -> socket:[3474816504]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 71 -> /proc/544/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 72 -> socket:[3474816505]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 73 -> /proc/545/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 74 -> socket:[3474816506]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 75 -> socket:[3474816507]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 76 -> /proc/546/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 77 -> socket:[3474816508]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 78 -> socket:[3474816509]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 79 -> /proc/548/pagemap
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 8 -> pipe:[3474546378]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 80 -> /proc/549/pagemap
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 81 -> socket:[3474816510]
From worker 12: lrwx------ 1 juliaci juliaci 64 Jul 12 01:21 82 -> socket:[3474816511]
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 01:21 9 -> pipe:[3474642323]
From worker 12: lr-x------ 1 juliaci juliaci 64 Jul 12 01:21 99 -> /proc/587/pagemap
From worker 12: l-wx------ 1 juliaci juliaci 64 Jul 12 00:47 999 -> /dev/null
pagemap is something rr uses, but I don't know why it would be open in the child