panic: runtime error: integer divide by zero

goroutine 339553 [running]:
panic(0xedb660, 0x19eb7e0)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc000903330 sp=0xc000903278 pc=0x43438d
runtime.panicdivide()
	GOROOT/src/runtime/panic.go:191 +0x5b fp=0xc000903350 sp=0xc000903330 pc=0x432afb
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).bucket(0xc000386ad0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0)
	pkg/tcpip/stack/conntrack.go:508 +0x299 fp=0xc0009033f0 sp=0xc000903350 pc=0x7ba679
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).connForTID(0xc000386ad0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0, 0x0)
	pkg/tcpip/stack/conntrack.go:247 +0xa4 fp=0xc0009034d8 sp=0xc0009033f0 pc=0x7b88f4
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).originalDst(0xc000386ad0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20, 0x20, 0xf456e0, ...)
	pkg/tcpip/stack/conntrack.go:621 +0xe6 fp=0xc000903570 sp=0xc0009034d8 pc=0x7bb016
gvisor.dev/gvisor/pkg/tcpip/stack.(*IPTables).OriginalDst(...)
	pkg/tcpip/stack/iptables.go:422
gvisor.dev/gvisor/pkg/tcpip/transport/tcp.(*endpoint).GetSockOpt(0xc095eb9800, 0xe5da20, 0xc0970b9560, 0xc0970bd6f0)
	pkg/tcpip/transport/tcp/endpoint.go:2017 +0x111 fp=0xc000903670 sp=0xc000903570 pc=0x99df11
gvisor.dev/gvisor/pkg/sentry/socket/netstack.getSockOptIP(0xc0970d4000, 0x7ff0470c19e0, 0xc095eb9800, 0x50, 0x100c, 0x2, 0xc0009037a0, 0x40a605, 0xf441e0)
	pkg/sentry/socket/netstack/netstack.go:1613 +0xa32 fp=0xc000903740 sp=0xc000903670 pc=0x9e1b02
gvisor.dev/gvisor/pkg/sentry/socket/netstack.GetSockOpt(0xc0970d4000, 0x120c260, 0xc095e8f100, 0x7ff0470c19e0, 0xc095eb9800, 0x2, 0x1, 0x0, 0x50, 0x100c, ...)
	pkg/sentry/socket/netstack/netstack.go:998 +0x163 fp=0xc0009037b0 sp=0xc000903740 pc=0x9dd583
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).GetSockOpt(0xc095e8f100, 0xc0970d4000, 0x0, 0x50, 0x20000240, 0x100c, 0x0, 0x0, 0x0)
	pkg/sentry/socket/netstack/netstack.go:981 +0x8a8 fp=0xc0009039c8 sp=0xc0009037b0 pc=0x9dd388
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.getSockOpt(0xc0970d4000, 0x7ff0470c18c8, 0xc095e8f100, 0x0, 0x50, 0x20000240, 0x100c, 0xc0970d493c, 0x10, 0x90)
	pkg/sentry/syscalls/linux/sys_socket.go:514 +0xae fp=0xc000903a38 sp=0xc0009039c8 pc=0x92e74e
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.GetSockOpt(0xc0970d4000, 0x3, 0x0, 0x50, 0x20000240, 0x20000040, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:468 +0x218 fp=0xc000903b08 sp=0xc000903a38 pc=0x92e248
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0970d4000, 0x37, 0x3, 0x0, 0x50, 0x20000240, 0x20000040, 0x0, 0x0, 0x1039940, ...)
	pkg/sentry/kernel/task_syscall.go:170 +0x122 fp=0xc000903c68 sp=0xc000903b08 pc=0x8bdd72
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0970d4000, 0x37, 0x3, 0x0, 0x50, 0x20000240, 0x20000040, 0x0, 0x20000040, 0x0)
	pkg/sentry/kernel/task_syscall.go:305 +0x66 fp=0xc000903cf0 sp=0xc000903c68 pc=0x8bef56
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0970d4000, 0x37, 0x3, 0x0, 0x50, 0x20000240, 0x20000040, 0x0, 0x11d9501, 0x100000000000000)
	pkg/sentry/kernel/task_syscall.go:265 +0x96 fp=0xc000903d50 sp=0xc000903cf0 pc=0x8beae6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0970d4000, 0x2, 0xc0970d4000)
	pkg/sentry/kernel/task_syscall.go:240 +0x15c fp=0xc000903e10 sp=0xc000903d50 pc=0x8be47c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0970d4000, 0x11d9540, 0x0)
	pkg/sentry/kernel/task_run.go:274 +0xc18 fp=0xc000903f60 sp=0xc000903e10 pc=0x8b2da8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0970d4000, 0x3d7d)
	pkg/sentry/kernel/task_run.go:92 +0x18b fp=0xc000903fd0 sp=0xc000903f60 pc=0x8b1a7b
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc000903fd8 sp=0xc000903fd0 pc=0x467d61
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0xfe