panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x6e3a3f]

goroutine 257 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0)
	pkg/sentry/kernel/task_identity.go:27 +0x2f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc42043c460, 0xc42043c468)
	pkg/sentry/kernel/fasync/fasync.go:60 +0x6f
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc4203f02c0, 0xc4206d0004)
	pkg/waiter/waiter.go:190 +0x9c
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectedEndpoint).CloseNotify(0xc4201f5020)
	pkg/tcpip/transport/unix/unix.go:654 +0x56
gvisor.googlesource.com/gvisor/pkg/tcpip/transport/unix.(*connectionedEndpoint).Close(0xc42043c070)
	pkg/tcpip/transport/unix/connectioned.go:217 +0x1b7
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef.func1()
	pkg/sentry/socket/unix/unix.go:75 +0x33
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc4206de410, 0xc420631a20)
	pkg/refs/refcounter.go:297 +0x121
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).DecRef(0xc4206de410)
	pkg/sentry/socket/unix/unix.go:74 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/socket/unix.(*SocketOperations).Release(0xc4206de410)
	pkg/sentry/socket/unix/unix.go:83 +0x2b
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:125 +0x79
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc4202185a0, 0xc420631af0)
	pkg/refs/refcounter.go:297 +0x121
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc4202185a0)
	pkg/sentry/fs/file.go:119 +0x48
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Close(0xc420152d00, 0x3, 0x8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:696 +0x14e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc420152d00, 0x3, 0x3, 0x8, 0x0, 0x0, 0x0, 0x0, 0x4321bb, 0xb9b360, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x307
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420152d00, 0x3, 0x3, 0x8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:280 +0x62
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420152d00, 0x3, 0x3, 0x8, 0x0, 0x0, 0x0, 0x0, 0x86d390, 0xc4207c6158)
	pkg/sentry/kernel/task_syscall.go:241 +0x91
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420152d00, 0x2, 0xc420414d80)
	pkg/sentry/kernel/task_syscall.go:216 +0x142
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420152d00, 0xc4de60, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0xe56
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420152d00, 0x19)
	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