panic: interface conversion: unix.Receiver is nil, not *unix.queueReceiver

goroutine 1496757 [running]:
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).UnidirectionalConnect(0xc421b49900, 0xc4240f78d8, 0x42eb2d, 0xc4204c5940)
	pkg/tcpip/transport/unix/connectionless.go:80 +0x158
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).Connect(0xc4200195e0, 0x7fa8686bb100, 0xc421b49900, 0x6e)
	pkg/tcpip/transport/unix/connectionless.go:117 +0x43
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Connect(0xc420019680, 0xc42422e000, 0xc42031e230, 0x6e, 0x6e, 0x1, 0x0)
	pkg/sentry/socket/unix/unix.go:340 +0xe6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Connect(0xc42422e000, 0x4, 0x20000100, 0x6e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:278 +0x21e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc42422e000, 0x2a, 0x4, 0x20000100, 0x6e, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc42422e000, 0x2a, 0x4, 0x20000100, 0x6e, 0x0, 0x0, 0x0, 0x4, 0x20000100)
	pkg/sentry/kernel/task_syscall.go:278 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc42422e000, 0x2a, 0x4, 0x20000100, 0x6e, 0x0, 0x0, 0x0, 0xc4219c60a0, 0xc4240f7c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc42422e000, 0x2, 0xc42074a5a0)
	pkg/sentry/kernel/task_syscall.go:216 +0x19d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc42422e000, 0x10e4580, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc42422e000, 0x5020)
	pkg/sentry/kernel/task_run.go:95 +0x265
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:258 +0x194