panic: Incrementing non-positive count 0xc012eda600 on kernel.ProcessGroup

goroutine 451620 [running]:
panic(0x10adbe0, 0xc005237630)
	GOROOT/src/runtime/panic.go:1064 +0x470 fp=0xc01081f930 sp=0xc01081f878 pc=0x437110
gvisor.dev/gvisor/pkg/sentry/kernel.(*ProcessGroupRefs).IncRef(0xc012eda600)
	bazel-out/k8-fastbuild-ST-3bfd66f45e612c1a5c797474a25664e227d81bf914f3b08a40e00b2e2692afa4/bin/pkg/sentry/kernel/process_group_refs.go:82 +0x18c fp=0xc01081f9a8 sp=0xc01081f930 pc=0xa157ac
gvisor.dev/gvisor/pkg/sentry/kernel.(*ProcessGroup).incRefWithParent(0xc012eda600, 0xc00ff655c0)
	pkg/sentry/kernel/sessions.go:154 +0x68 fp=0xc01081f9c0 sp=0xc01081f9a8 pc=0xa20e88
gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).CreateProcessGroup.func1(0xc0067fe000)
	pkg/sentry/kernel/sessions.go:483 +0x4e fp=0xc01081f9e8 sp=0xc01081f9c0 pc=0xa6862e
gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).forEachChildThreadGroupLocked(0xc0133ff000, 0xc01081fac8)
	pkg/sentry/kernel/thread_group.go:356 +0xa4 fp=0xc01081fa78 sp=0xc01081f9e8 pc=0xa4e604
gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).CreateProcessGroup(0xc0133ff000, 0x0, 0x0)
	pkg/sentry/kernel/sessions.go:481 +0x371 fp=0xc01081fb00 sp=0xc01081fa78 pc=0xa21e71
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setpgid(0xc00f297500, 0x4d9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x857f010c8ff8, 0xc01081fc60, ...)
	pkg/sentry/syscalls/linux/sys_thread.go:784 +0x105 fp=0xc01081fb90 sp=0xc01081fb00 pc=0xae36e5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00f297500, 0x6d, 0x4d9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1286d40, ...)
	pkg/sentry/kernel/task_syscall.go:116 +0x1b9 fp=0xc01081fc50 sp=0xc01081fb90 pc=0xa48b99
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00f297500, 0x6d, 0x4d9, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:291 +0x70 fp=0xc01081fcd8 sp=0xc01081fc50 pc=0xa49e50
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00f297500, 0x6d, 0x4d9, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc007013960, 0xc0070138c0)
	pkg/sentry/kernel/task_syscall.go:238 +0xb4 fp=0xc01081fd38 sp=0xc01081fcd8 pc=0xa49954
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00f297500, 0x2, 0xc00f297500)
	pkg/sentry/kernel/task_syscall.go:205 +0x198 fp=0xc01081fe08 sp=0xc01081fd38 pc=0xa49238
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00f297500, 0x13f2600, 0x0)
	pkg/sentry/kernel/task_run.go:327 +0xd95 fp=0xc01081ff60 sp=0xc01081fe08 pc=0xa3bcf5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00f297500, 0x4601)
	pkg/sentry/kernel/task_run.go:100 +0x1e2 fp=0xc01081ffd0 sp=0xc01081ff60 pc=0xa3a802
runtime.goexit()
	src/runtime/asm_amd64.s:1374 +0x1 fp=0xc01081ffd8 sp=0xc01081ffd0 pc=0x470681
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:374 +0x116