panic: ptrace status unexpected: got 9, wanted stopped

goroutine 42206 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc00065ae10, 0x0, 0x3bcd)
	pkg/sentry/platform/ptrace/subprocess.go:323 +0x3fb
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).switchToApp(0xc000512580, 0xc00032e6c0, 0xd2c720, 0xc0006b59e0, 0xc000936e00)
	pkg/sentry/platform/ptrace/subprocess.go:508 +0x381
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*context).Switch(0xc00032e6c0, 0xd1e340, 0xc000512580, 0xd2c720, 0xc0006b59e0, 0x7fc9ffffffff, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/platform/ptrace/ptrace.go:102 +0x74
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00071b500, 0xd119c0, 0x0)
	pkg/sentry/kernel/task_run.go:205 +0x348
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc00071b500, 0x106)
	pkg/sentry/kernel/task_run.go:91 +0x149
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:279 +0xfe