panic: Incrementing non-positive count 0xc0007d0600 on kernel.ProcessGroup

goroutine 463 [running]:
panic(0x16e4360, 0xc00035e4b0)
	GOROOT/src/runtime/panic.go:1064 +0x470 fp=0xc000471390 sp=0xc0004712d8 pc=0x439130
gvisor.dev/gvisor/pkg/sentry/kernel.(*ProcessGroupRefs).IncRef(0xc0007d0600)
	bazel-out/k8-fastbuild-ST-85f86a41aebae9b44e06a227fc2c34bde1094098ba6d32170f99a32414da6482/bin/pkg/sentry/kernel/process_group_refs.go:72 +0x18c fp=0xc000471408 sp=0xc000471390 pc=0xd1292c
gvisor.dev/gvisor/pkg/sentry/kernel.(*ProcessGroup).incRefWithParent(...)
	pkg/sentry/kernel/sessions.go:144
gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).CreateProcessGroup.func1(0xc00038f800)
	pkg/sentry/kernel/sessions.go:407 +0x9f fp=0xc000471468 sp=0xc000471408 pc=0xd8621f
gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).forEachChildThreadGroupLocked(0xc00033d800, 0xc000471610)
	pkg/sentry/kernel/thread_group.go:340 +0xf7 fp=0xc000471510 sp=0xc000471468 pc=0xd652f7
gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).CreateProcessGroup(0xc00033d800, 0x0, 0x0)
	pkg/sentry/kernel/sessions.go:406 +0x616 fp=0xc000471670 sp=0xc000471510 pc=0xd23bf6
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setpgid(0xc0007d5500, 0x6, 0x0, 0x434c49, 0x0, 0x1, 0x1, 0xc00004a000, 0xc0004717a8, 0x4435bc, ...)
	pkg/sentry/syscalls/linux/sys_thread.go:616 +0x105 fp=0xc000471730 sp=0xc000471670 pc=0xe22ea5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0007d5500, 0x6d, 0x6, 0x0, 0x434c49, 0x0, 0x1, 0x1, 0x6, 0xc000496a60, ...)
	pkg/sentry/kernel/task_syscall.go:104 +0x453 fp=0xc0004719d0 sp=0xc000471730 pc=0xd5d853
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0007d5500, 0x6d, 0x6, 0x0, 0x434c49, 0x0, 0x1, 0x1, 0x408638, 0xc0007d5ddf)
	pkg/sentry/kernel/task_syscall.go:239 +0xba fp=0xc000471ab0 sp=0xc0004719d0 pc=0xd5efda
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0007d5500, 0x6d, 0x6, 0x0, 0x434c49, 0x0, 0x1, 0x1, 0x137856b, 0x2d147d4)
	pkg/sentry/kernel/task_syscall.go:199 +0x10f fp=0xc000471b60 sp=0xc000471ab0 pc=0xd5e8ef
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0007d5500, 0x2, 0xc0007d5500)
	pkg/sentry/kernel/task_syscall.go:174 +0x1ea fp=0xc000471ca0 sp=0xc000471b60 pc=0xd5e08a
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0007d5500, 0x1a6f8c0, 0x0)
	pkg/sentry/kernel/task_run.go:282 +0x12a7 fp=0xc000471ed8 sp=0xc000471ca0 pc=0xd49a87
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0007d5500, 0x11)
	pkg/sentry/kernel/task_run.go:97 +0x398 fp=0xc000471fd0 sp=0xc000471ed8 pc=0xd47bb8
runtime.goexit()
	src/runtime/asm_amd64.s:1374 +0x1 fp=0xc000471fd8 sp=0xc000471fd0 pc=0x474681
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:323 +0x1a5