panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x8653ad]

goroutine 3195285 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0)
	pkg/sentry/kernel/task_identity.go:27 +0x3d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc4256104d0, 0xc4256104d8)
	pkg/sentry/kernel/fasync/fasync.go:60 +0xde
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc423489d60, 0xffffffffffff0010)
	pkg/waiter/waiter.go:190 +0xe1
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*Writer).Release(0xc420712b60)
	pkg/sentry/kernel/pipe/writer.go:33 +0x72
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:125 +0xe2
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc425614bd0, 0xc4206ed960)
	pkg/refs/refcounter.go:297 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc425614bd0)
	pkg/sentry/fs/file.go:119 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Close(0xc420edb200, 0x4, 0x7291c0, 0x0, 0x920200, 0x9200c0, 0x1dbd24, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:696 +0x17e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc420edb200, 0x3, 0x4, 0x7291c0, 0x0, 0x920200, 0x9200c0, 0x1dbd24, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc420edb200, 0x3, 0x4, 0x7291c0, 0x0, 0x920200, 0x9200c0, 0x1dbd24, 0x4, 0x46155c)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc420edb200, 0x3, 0x4, 0x7291c0, 0x0, 0x920200, 0x9200c0, 0x1dbd24, 0xc42578cd60, 0xc4206edc68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc420edb200, 0x2, 0xc420936120)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc420edb200, 0x10bc5a0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc420edb200, 0x94db)
	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