panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x889703]

goroutine 986489 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Credentials(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_identity.go:25 +0x53
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/fasync.(*FileAsync).Callback(0xc420f7ca90, 0xc420f7ca98)
	pkg/sentry/kernel/fasync/fasync.go:60 +0x119
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc42362c640, 0xffffffffffff0010)
	pkg/waiter/waiter.go:188 +0xe1
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*Writer).Release(0xc420428098)
	pkg/sentry/kernel/pipe/writer.go:31 +0x72
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef.func1()
	pkg/sentry/fs/file.go:123 +0xe2
gvisor.googlesource.com/gvisor/pkg/refs.(*AtomicRefCount).DecRefWithDestructor(0xc4211d7b00, 0xc421531960)
	pkg/refs/refcounter.go:293 +0x198
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).DecRef(0xc4211d7b00)
	pkg/sentry/fs/file.go:117 +0x7a
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Close(0xc4205cbb00, 0x5, 0x72a1b0, 0x0, 0x920200, 0x9200c0, 0x63f9b, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_file.go:690 +0x17e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4205cbb00, 0x3, 0x5, 0x72a1b0, 0x0, 0x920200, 0x9200c0, 0x63f9b, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4205cbb00, 0x3, 0x5, 0x72a1b0, 0x0, 0x920200, 0x9200c0, 0x63f9b, 0x5, 0x72a1b0)
	pkg/sentry/kernel/task_syscall.go:278 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4205cbb00, 0x3, 0x5, 0x72a1b0, 0x0, 0x920200, 0x9200c0, 0x63f9b, 0xc420e20760, 0xc421531c68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4205cbb00, 0x2, 0xc420357b00)
	pkg/sentry/kernel/task_syscall.go:216 +0x19d
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4205cbb00, 0x10e4580, 0x0)
	pkg/sentry/kernel/task_run.go:217 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4205cbb00, 0x2040)
	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