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

goroutine 526958 [running]:
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).UnidirectionalConnect(0xc42118ec30, 0xc421375a68, 0x427f59, 0x8)
	pkg/tcpip/transport/unix/connectionless.go:82 +0xed
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).Connect(0xc4206d45f0, 0x7fa0db0023a8, 0xc42118ec30, 0x80)
	pkg/tcpip/transport/unix/connectionless.go:119 +0x35
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Connect(0xc4206d4690, 0xc420e96000, 0xc42130c000, 0x80, 0x80, 0x1, 0x0)
	pkg/sentry/socket/unix/unix.go:342 +0xc6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Connect(0xc420e96000, 0x5, 0x20000140, 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(0xc420e96000, 0x2a, 0x5, 0x20000140, 0x80, 0x0, 0x0, 0x0, 0x0, 0xb917a0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420e96000, 0x2a, 0x5, 0x20000140, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420e96000, 0x2a, 0x5, 0x20000140, 0x80, 0x0, 0x0, 0x0, 0xc42c60, 0x0)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420e96000, 0x2, 0xc42037ed80)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420e96000, 0xc42c60, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420e96000, 0xe13)
	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