segfault 'btrfs fi usage' on two device btrfs seed+sprout volume https://bugzilla.kernel.org/show_bug.cgi?id=204569 kernel 5.2.8 btrfs-progs 5.2.1 'btrfs fi show' does work: Label: 'first' uuid: f7638175-SNIP Total devices 2 FS bytes used 841.10GiB devid 2 size 1024.00GiB used 882.00GiB path /dev/mapper/first devid 3 size 698.62GiB used 2.06GiB path /dev/mapper/sdc devid2 is the seed devid3 is the sprout Mount options /dev/mapper/first on /mnt/first type btrfs (rw,noatime,seclabel,space_cache=v2,subvolid=5,subvol=/) 'btrfs fi usage /mnt/first' crashes with segmentation fault and no other messages dmesg shows [126052.599013] btrfs[14847]: segfault at 7ffe5e1e1018 ip 000000000046db14 sp 00007ffe5e1df1a0 error 4 in btrfs[40c000+7c000] [126052.599034] Code: 28 48 c7 40 08 00 00 00 00 48 8b 74 24 08 48 89 70 18 48 8b 74 24 10 48 01 70 08 48 83 c3 20 48 3b 5c 24 18 0f 84 12 ff ff ff <48> 8b 2b 41 8b 0e 85 c9 7e 95 49 8b 17 8d 41 ff 48 c1 e0 05 48 8d -- Chris
