panic: ufs_rename: lost dir entry Starting stack trace... panic(ffffffff82fc3a34) at panic+0x1ba sys/kern/subr_prf.c:229 ufs_rename(ffff80003762b498) at ufs_rename+0x18b2 VOP_RENAME(fffffd806e194440,fffffd806e194bd8,ffff80003762b668,fffffd806ab06cb8,0,ffff80003762b5b8) at VOP_RENAME+0x13c sys/kern/vfs_vops.c:376 dorenameat(ffff80002a4c3bf8,ffffff9c,20000540,ffffff9c,200005c0) at dorenameat+0x3f8 sys/kern/vfs_syscalls.c:3020 syscall(ffff80003762b800) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2f3f4f597d0, count: 251 End of stack trace.