panic: runtime error: integer divide by zero

goroutine 256571 [running]:
panic(0xedf940, 0x19f2840)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc0038df330 sp=0xc0038df278 pc=0x43438d
runtime.panicdivide()
	GOROOT/src/runtime/panic.go:191 +0x5b fp=0xc0038df350 sp=0xc0038df330 pc=0x432afb
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).bucket(0xc000139a90, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0)
	pkg/tcpip/stack/conntrack.go:508 +0x299 fp=0xc0038df3f0 sp=0xc0038df350 pc=0x7bd3b9
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).connForTID(0xc000139a90, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0, 0x0)
	pkg/tcpip/stack/conntrack.go:247 +0xa4 fp=0xc0038df4d8 sp=0xc0038df3f0 pc=0x7bb634
gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).originalDst(0xc000139a90, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x20, 0x20, 0xf4a1e0, ...)
	pkg/tcpip/stack/conntrack.go:623 +0xe6 fp=0xc0038df570 sp=0xc0038df4d8 pc=0x7bdd56
gvisor.dev/gvisor/pkg/tcpip/stack.(*IPTables).OriginalDst(...)
	pkg/tcpip/stack/iptables.go:422
gvisor.dev/gvisor/pkg/tcpip/transport/tcp.(*endpoint).GetSockOpt(0xc007396000, 0xe61c40, 0xc004a10100, 0xc00133a390)
	pkg/tcpip/transport/tcp/endpoint.go:2017 +0x111 fp=0xc0038df670 sp=0xc0038df570 pc=0x9a0831
gvisor.dev/gvisor/pkg/sentry/socket/netstack.getSockOptIP(0xc00a864a80, 0x3f2f7ca42690, 0xc007396000, 0x50, 0x1000, 0x2, 0xc0038df7a0, 0x40a605, 0xf48ce0)
	pkg/sentry/socket/netstack/netstack.go:1632 +0xa32 fp=0xc0038df740 sp=0xc0038df670 pc=0x9e50f2
gvisor.dev/gvisor/pkg/sentry/socket/netstack.GetSockOpt(0xc00a864a80, 0x1212300, 0xc005fcc500, 0x3f2f7ca42690, 0xc007396000, 0x2, 0x1, 0x0, 0x50, 0x1000, ...)
	pkg/sentry/socket/netstack/netstack.go:1017 +0x163 fp=0xc0038df7b0 sp=0xc0038df740 pc=0x9e0b73
gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).GetSockOpt(0xc005fcc500, 0xc00a864a80, 0x0, 0x50, 0x20000280, 0x1000, 0x0, 0x0, 0x0)
	pkg/sentry/socket/netstack/netstack.go:1000 +0x918 fp=0xc0038df9c8 sp=0xc0038df7b0 pc=0x9e0978
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.getSockOpt(0xc00a864a80, 0x3f2f7ca42578, 0xc005fcc500, 0x0, 0x50, 0x20000280, 0x1000, 0xc00a8653bc, 0x10, 0x90)
	pkg/sentry/syscalls/linux/sys_socket.go:514 +0xae fp=0xc0038dfa38 sp=0xc0038df9c8 pc=0x930d1e
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.GetSockOpt(0xc00a864a80, 0x3, 0x0, 0x50, 0x20000280, 0x20000040, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:468 +0x218 fp=0xc0038dfb08 sp=0xc0038dfa38 pc=0x930818
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00a864a80, 0x37, 0x3, 0x0, 0x50, 0x20000280, 0x20000040, 0x0, 0xc0038dfcd8, 0x103e6e0, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x122 fp=0xc0038dfc68 sp=0xc0038dfb08 pc=0x8c03f2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00a864a80, 0x37, 0x3, 0x0, 0x50, 0x20000280, 0x20000040, 0x0, 0x20000040, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc0038dfcf0 sp=0xc0038dfc68 pc=0x8c15d6
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00a864a80, 0x37, 0x3, 0x0, 0x50, 0x20000280, 0x20000040, 0x0, 0x11df3a0, 0x0)
	pkg/sentry/kernel/task_syscall.go:198 +0x96 fp=0xc0038dfd50 sp=0xc0038dfcf0 pc=0x8c1166
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00a864a80, 0x2, 0xc00a864a80)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc0038dfe10 sp=0xc0038dfd50 pc=0x8c0afc
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00a864a80, 0x11df3a0, 0x0)
	pkg/sentry/kernel/task_run.go:275 +0xc18 fp=0xc0038dff60 sp=0xc0038dfe10 pc=0x8b54c8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00a864a80, 0x1b3d)
	pkg/sentry/kernel/task_run.go:93 +0x18b fp=0xc0038dffd0 sp=0xc0038dff60 pc=0x8b419b
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc0038dffd8 sp=0xc0038dffd0 pc=0x467d61
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0xfe