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

goroutine 3538301 [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(0xc423d845b0, 0xc423d845b8)
	pkg/sentry/kernel/fasync/fasync.go:60 +0xde
gvisor.googlesource.com/gvisor/pkg/waiter.(*Queue).Notify(0xc4207fe000, 0x10c0001)
	pkg/waiter/waiter.go:190 +0xe1
gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*ReaderWriter).Write(0xc4204f0020, 0x10cb800, 0xc4205bc400, 0xc42081e240, 0x10ca360, 0xc421d80c80, 0x0, 0x1, 0x20002b40, 0xa0, ...)
	pkg/sentry/kernel/pipe/reader_writer.go:66 +0x139
gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Writev(0xc42081e240, 0x10cb800, 0xc4205bc400, 0x10ca360, 0xc421d80c80, 0x0, 0x1, 0x20002b40, 0xa0, 0x100, ...)
	pkg/sentry/fs/file.go:273 +0x1bb
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.writev(0xc4205bc400, 0xc42081e240, 0x10ca360, 0xc421d80c80, 0x0, 0x1, 0x20002b40, 0xa0, 0x100, 0xa0, ...)
	pkg/sentry/syscalls/linux/sys_write.go:191 +0xa2
gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Write(0xc4205bc400, 0x0, 0x20002b40, 0xa0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/sys_write.go:67 +0x296
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4205bc400, 0x1, 0x0, 0x20002b40, 0xa0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/kernel/task_syscall.go:162 +0x14f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4205bc400, 0x1, 0x0, 0x20002b40, 0xa0, 0x0, 0x0, 0x0, 0x0, 0x46155c)
	pkg/sentry/kernel/task_syscall.go:280 +0x7e
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4205bc400, 0x1, 0x0, 0x20002b40, 0xa0, 0x0, 0x0, 0x0, 0xc4215e2be0, 0xc42344fc68)
	pkg/sentry/kernel/task_syscall.go:241 +0xc4
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4205bc400, 0x2, 0xc4202defc0)
	pkg/sentry/kernel/task_syscall.go:216 +0x19f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4205bc400, 0x10bc5a0, 0x0)
	pkg/sentry/kernel/task_run.go:219 +0x1502
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4205bc400, 0x88f4)
	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