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

goroutine 5755133 [running]:
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).UnidirectionalConnect(0xc420f3e0a0, 0xc4202dda68, 0x427f59, 0x8)
	pkg/tcpip/transport/unix/connectionless.go:82 +0xed
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).Connect(0xc4204b5db0, 0x7f7cea14a060, 0xc420f3e0a0, 0x6e)
	pkg/tcpip/transport/unix/connectionless.go:119 +0x35
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Connect(0xc4204b5ea0, 0xc4212e4900, 0xc4211ea000, 0x6e, 0x6e, 0x1, 0x0)
	pkg/sentry/socket/unix/unix.go:342 +0xc6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Connect(0xc4212e4900, 0x0, 0x20000000, 0x6e, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:278 +0x1eb
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4212e4900, 0x2a, 0x0, 0x20000000, 0x6e, 0x0, 0x0, 0x0, 0x0, 0xb93ae0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4212e4900, 0x2a, 0x0, 0x20000000, 0x6e, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4212e4900, 0x2a, 0x0, 0x20000000, 0x6e, 0x0, 0x0, 0x0, 0xc45220, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4212e4900, 0x2, 0xc42048d320)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4212e4900, 0xc45220, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4212e4900, 0x7c55)
	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:258 +0x100