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

goroutine 3712896 [running]:
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).UnidirectionalConnect(0xc420454c30, 0xc4265dd8d8, 0x42eb2d, 0xc421f4ae00)
	pkg/tcpip/transport/unix/connectionless.go:80 +0x158
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).Connect(0xc426340af0, 0x7fa3e807b480, 0xc420454c30, 0x6e)
	pkg/tcpip/transport/unix/connectionless.go:117 +0x43
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Connect(0xc426340b90, 0xc4238fa000, 0xc422a08000, 0x6e, 0x6e, 0x1, 0x0)
	pkg/sentry/socket/unix/unix.go:340 +0xe6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Connect(0xc4238fa000, 0x4, 0x20000080, 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(0xc4238fa000, 0x2a, 0x4, 0x20000080, 0x6e, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4238fa000, 0x2a, 0x4, 0x20000080, 0x6e, 0x0, 0x0, 0x0, 0x4, 0x20000080)
	pkg/sentry/kernel/task_syscall.go:278 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4238fa000, 0x2a, 0x4, 0x20000080, 0x6e, 0x0, 0x0, 0x0, 0xc4234460a0, 0xc4265ddc68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4238fa000, 0x2, 0xc420700480)
	pkg/sentry/kernel/task_syscall.go:216 +0x19d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4238fa000, 0x10e4580, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4238fa000, 0xbff0)
	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