Arch, kernel 4.15.14, btrfs progs 4.15.1.

Had some SATA drives dropout.  Have a few btrfs volumes with parent
transid verify failed errors, that all mount.

This volume has nothing I care about, so I'm just reporting it since
it looks like a bug.  None of my other volumes having issues cause
core dumps.  Happy to send whatever other info might help track it
down.


# btrfs check /dev/lvm/snapper1
Checking filesystem on /dev/lvm/snapper1
UUID: ef6f4923-0a03-4e41-9655-e24a13a1d879
parent transid verify failed on 862240768 wanted 29524 found 29182
parent transid verify failed on 862240768 wanted 29524 found 29182
checking extents
check/main.c:3654: check_owner_ref: BUG_ON `rec->is_root` triggered, value 1
btrfs(+0x5f98c)[0x55ec9db9198c]
btrfs(+0x12ad6)[0x55ec9db44ad6]
btrfs(+0x18c7f)[0x55ec9db4ac7f]
btrfs(+0x199c6)[0x55ec9db4b9c6]
btrfs(+0x19fc0)[0x55ec9db4bfc0]
btrfs(cmd_check+0xf63)[0x55ec9db94423]
btrfs(main+0x81)[0x55ec9db4e441]
/usr/lib/libc.so.6(__libc_start_main+0xea)[0x7f6923f2ff4a]
btrfs(_start+0x2a)[0x55ec9db4e55a]
[1]    9612 abort (core dumped)  btrfs check /dev/lvm/snapper1
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