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

goroutine 227 [running]:
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).UnidirectionalConnect(0xc4202a4a50, 0xc4207afa60, 0x427f59, 0x8)
	pkg/tcpip/transport/unix/connectionless.go:70 +0xed
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).Connect(0xc42057c730, 0x3fde9c599140, 0xc4202a4a50, 0x80)
	pkg/tcpip/transport/unix/connectionless.go:107 +0x35
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Connect(0xc42057c7d0, 0xc4207f2900, 0xc42012c080, 0x80, 0x80, 0x1, 0x0)
	pkg/sentry/socket/unix/unix.go:340 +0xc6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Connect(0xc4207f2900, 0x4, 0x20000040, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:278 +0x1eb
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4207f2900, 0x2a, 0x4, 0x20000040, 0x80, 0x0, 0x0, 0x0, 0xc4207afca8, 0xbb9fc0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4207f2900, 0x2a, 0x4, 0x20000040, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:278 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4207f2900, 0x2a, 0x4, 0x20000040, 0x80, 0x0, 0x0, 0x0, 0xc42053c400, 0xc4207afe00)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4207f2900, 0x2, 0xc4208a2000)
	pkg/sentry/kernel/task_syscall.go:216 +0x10c
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4207f2900, 0xc6d8e0, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0xed8
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4207f2900, 0xd)
	pkg/sentry/kernel/task_run.go:95 +0x174
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:251 +0x100