panic: ufs_rename: lost dir entry Starting stack trace... panic(ffffffff82fcaf89) at panic+0x1ba sys/kern/subr_prf.c:229 ufs_rename(ffff800037617498) at ufs_rename+0x18b2 VOP_RENAME(fffffd805aaf2510,fffffd8078a7c8a0,ffff800037617668,fffffd806d1d52e0,0,ffff8000376175b8) at VOP_RENAME+0x13c sys/kern/vfs_vops.c:376 dorenameat(ffff80002a4a2cf8,ffffff9c,20000540,ffffff9c,200005c0) at dorenameat+0x3f8 sys/kern/vfs_syscalls.c:3020 syscall(ffff800037617800) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x23a9412cf50, count: 251 End of stack trace.