panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x753045]

goroutine 126 [running]:
panic({0x1041fe0?, 0x2741fe0?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc0004bf190 sp=0xc0004bf0e0 pc=0x43a72c
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:261
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:861 +0x378 fp=0xc0004bf1f0 sp=0xc0004bf190 pc=0x451f38
gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).IncRef(0x0?)
	pkg/sentry/vfs/mount.go:801 +0x5 fp=0xc0004bf1f8 sp=0xc0004bf1f0 pc=0x753045
gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.IncRef({0x0?, 0x0?})
	pkg/sentry/vfs/vfs.go:1078 +0x25 fp=0xc0004bf218 sp=0xc0004bf1f8 pc=0x765945
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).umountRecursiveLocked(0xc000386c58, 0xc03cbc06e0, 0xc0004bf35e)
	pkg/sentry/vfs/mount.go:698 +0x36d fp=0xc0004bf318 sp=0xc0004bf218 pc=0x752b4d
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).forgetDeadMountpoint(0xc000386c58, {0x142a0f8, 0xc0005fea80}, 0xc053b52800)
	pkg/sentry/vfs/dentry.go:342 +0x172 fp=0xc0004bf4c0 sp=0xc0004bf318 pc=0x73fc92
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).CommitDeleteDentry(0xc053d7bb98?, {0x142a0f8?, 0xc0005fea80?}, 0xc00230c834?)
	pkg/sentry/vfs/dentry.go:237 +0x6c fp=0xc0004bf4f8 sp=0xc0004bf4c0 pc=0x73f54c
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).RmdirAt(0xc0007300d0, {0x142a0f8, 0xc0005fea80}, 0xc00d44f200)
	pkg/sentry/fsimpl/tmpfs/filesystem.go:733 +0x59f fp=0xc0004bf720 sp=0xc0004bf4f8 pc=0x84ff9f
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).RmdirAt(0xc0000fd080?, {0x142a0f8, 0xc0005fea80}, 0xc00019d200?, 0xc00230c801?)
	pkg/sentry/vfs/vfs.go:607 +0xf1 fp=0xc0004bf780 sp=0xc0004bf720 pc=0x7629f1
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.rmdirat(0xc0005fea80, 0x5fea80?, 0xc0004bf8e0?)
	pkg/sentry/syscalls/linux/sys_file.go:961 +0x1a5 fp=0xc0004bf8f0 sp=0xc0004bf780 pc=0xa74dc5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Unlinkat(0xc0005fea80?, 0xc00069bb00?, {{0xffffffffffffff9c}, {0xc0089562c0}, {0x200}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:1127 +0x33 fp=0xc0004bf918 sp=0xc0004bf8f0 pc=0xa762f3
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0005fea80, 0x107, {{0xffffffffffffff9c}, {0xc0089562c0}, {0x200}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x673 fp=0xc0004bfc58 sp=0xc0004bf918 pc=0x943dd3
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0005fea80, 0x0?, {{0xffffffffffffff9c}, {0xc0089562c0}, {0x200}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x45 fp=0xc0004bfcb8 sp=0xc0004bfc58 pc=0x944f45
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0003fd440?, 0xc0004bfe00?, {{0xffffffffffffff9c}, {0xc0089562c0}, {0x200}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x59 fp=0xc0004bfd18 sp=0xc0004bfcb8 pc=0x944c59
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0005aa370?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2d5 fp=0xc0004bfe10 sp=0xc0004bfd18 pc=0x9449f5
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000132200?, 0xc0005fea80)
	pkg/sentry/kernel/task_run.go:269 +0xfb7 fp=0xc0004bff48 sp=0xc0004bfe10 pc=0x938cd7
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0005fea80, 0xb)
	pkg/sentry/kernel/task_run.go:98 +0x1ef fp=0xc0004bffc0 sp=0xc0004bff48 pc=0x93766f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:391 +0x25 fp=0xc0004bffe0 sp=0xc0004bffc0 pc=0x9426e5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc0004bffe8 sp=0xc0004bffe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 36
	pkg/sentry/kernel/task_start.go:391 +0xe5