panic: runtime error: integer divide by zero

goroutine 1443927 [running]:
panic(0x1530860, 0x21c5320)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc002a3abe0 sp=0xc002a3ab28 pc=0x43611d
runtime.panicdivide()
	GOROOT/src/runtime/panic.go:191 +0x5b fp=0xc002a3ac00 sp=0xc002a3abe0 pc=0x43488b
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).bucket(0xc000143610, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0)
	pkg/tcpip/stack/conntrack.go:508 +0x3df fp=0xc002a3acf8 sp=0xc002a3ac00 pc=0x9f5fcf
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).connForTID(0xc000143610, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0, 0x0)
	pkg/tcpip/stack/conntrack.go:247 +0xe0 fp=0xc002a3aea8 sp=0xc002a3acf8 pc=0x9f3720
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).originalDst(0xc000143610, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x14dbfe0, 0xc1067de58f, 0x203041, ...)
	pkg/tcpip/stack/conntrack.go:621 +0x158 fp=0xc002a3afa0 sp=0xc002a3aea8 pc=0x9f6a88
gvisor.dev/gvisor/pkg/tcpip/stack.(*IPTables).OriginalDst(...)
	pkg/tcpip/stack/iptables.go:422
gvisor.dev/gvisor/pkg/tcpip/transport/tcp.(*endpoint).GetSockOpt(0xc003fbec00, 0x14b1de0, 0xc104081020, 0xc1067de580)
	pkg/tcpip/transport/tcp/endpoint.go:2017 +0x1eb fp=0xc002a3b118 sp=0xc002a3afa0 pc=0xcd85db
gvisor.dev/gvisor/pkg/sentry/socket/netstack.getSockOptIP(0xc00253ea80, 0x7f43b10b4238, 0xc003fbec00, 0x50, 0x1000, 0x2, 0x7f437ac36c80, 0x0, 0x447a17)
	pkg/sentry/socket/netstack/netstack.go:1613 +0xfe7 fp=0xc002a3b2c8 sp=0xc002a3b118 pc=0xd475a7
gvisor.dev/gvisor/pkg/sentry/socket/netstack.GetSockOpt(0xc00253ea80, 0x18ddae0, 0xc0009f5d00, 0x7f43b10b4238, 0xc003fbec00, 0x2, 0x1, 0x0, 0x50, 0x1000, ...)
	pkg/sentry/socket/netstack/netstack.go:998 +0x1bf fp=0xc002a3b350 sp=0xc002a3b2c8 pc=0xd40ebf
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).GetSockOpt(0xc0009f5d00, 0xc00253ea80, 0x0, 0x50, 0x20001280, 0x1000, 0x0, 0x0, 0x0)
	pkg/sentry/socket/netstack/netstack.go:981 +0xad9 fp=0xc002a3b588 sp=0xc002a3b350 pc=0xd40c49
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.getSockOpt(0xc00253ea80, 0x7f43b10b4120, 0xc0009f5d00, 0x0, 0x50, 0x20001280, 0x1000, 0x10, 0x90, 0x10)
	pkg/sentry/syscalls/linux/sys_socket.go:514 +0xd7 fp=0xc002a3b628 sp=0xc002a3b588 pc=0xc40667
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.GetSockOpt(0xc00253ea80, 0x4, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:468 +0x2b7 fp=0xc002a3b740 sp=0xc002a3b628 pc=0xc401e7
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00253ea80, 0x37, 0x4, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x340, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:170 +0x44e fp=0xc002a3b9e0 sp=0xc002a3b740 pc=0xb9ceee
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00253ea80, 0x37, 0x4, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x407baa, 0xc00253f357)
	pkg/sentry/kernel/task_syscall.go:305 +0xb5 fp=0xc002a3bac0 sp=0xc002a3b9e0 pc=0xb9e5a5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00253ea80, 0x37, 0x4, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x112c002, 0x2bb3872)
	pkg/sentry/kernel/task_syscall.go:265 +0x10a fp=0xc002a3bb70 sp=0xc002a3bac0 pc=0xb9df0a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00253ea80, 0x2, 0xc00253ea80)
	pkg/sentry/kernel/task_syscall.go:240 +0x1e8 fp=0xc002a3bcb0 sp=0xc002a3bb70 pc=0xb9d6f8
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00253ea80, 0x18aa100, 0x0)
	pkg/sentry/kernel/task_run.go:274 +0x11d9 fp=0xc002a3bee8 sp=0xc002a3bcb0 pc=0xb89f89
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00253ea80, 0xdcc)
	pkg/sentry/kernel/task_run.go:92 +0x31d fp=0xc002a3bfd0 sp=0xc002a3bee8 pc=0xb8815d
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc002a3bfd8 sp=0xc002a3bfd0 pc=0x46b961
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0x19e