panic: ufs_rename: lost dir entry Starting stack trace... panic(ffffffff82fd55c3) at panic+0x1ba sys/kern/subr_prf.c:229 ufs_rename(ffff800030de8e98) at ufs_rename+0x18b2 VOP_RENAME(fffffd80738ec120,fffffd805e71c370,ffff800030de9068,fffffd80738ec120,0,ffff800030de8fb8) at VOP_RENAME+0x13c sys/kern/vfs_vops.c:376 dorenameat(ffff80002a487710,ffffff9c,20000400,ffffff9c,20000140) at dorenameat+0x3f8 sys/kern/vfs_syscalls.c:3020 syscall(ffff800030de9200) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2fa6e627d20, count: 251 End of stack trace.