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

goroutine 4065186 [running]:
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).UnidirectionalConnect(0xc423f4d310, 0xc42099f8d8, 0x42eb2d, 0xc425aa2040)
	pkg/tcpip/transport/unix/connectionless.go:80 +0x158
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionlessEndpoint).Connect(0xc420ea63c0, 0x7f8024040250, 0xc423f4d310, 0x80)
	pkg/tcpip/transport/unix/connectionless.go:117 +0x43
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Connect(0xc420ea6460, 0xc424d2d600, 0xc424990880, 0x80, 0x80, 0x1, 0x0)
	pkg/sentry/socket/unix/unix.go:340 +0xe6
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Connect(0xc424d2d600, 0x6, 0x20000080, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_socket.go:278 +0x21e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc424d2d600, 0x2a, 0x6, 0x20000080, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc424d2d600, 0x2a, 0x6, 0x20000080, 0x80, 0x0, 0x0, 0x0, 0x6, 0x20000080)
	pkg/sentry/kernel/task_syscall.go:278 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc424d2d600, 0x2a, 0x6, 0x20000080, 0x80, 0x0, 0x0, 0x0, 0xc421024820, 0xc42099fc68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc424d2d600, 0x2, 0xc420132d80)
	pkg/sentry/kernel/task_syscall.go:216 +0x19d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc424d2d600, 0x10e4580, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc424d2d600, 0xcd94)
	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