panic: unable to find an index for ID: 0 goroutine 416 [running]: panic(0x17d7b20, 0xc000486930) GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc0001e7468 sp=0xc0001e73a0 pc=0x43a6c5 gvisor.dev/gvisor/pkg/sentry/kernel/semaphore.(*Registry).Remove(0xc0005b2180, 0xc000000000, 0xc0001f13e0, 0x0, 0x0) pkg/sentry/kernel/semaphore/semaphore.go:222 +0x23f fp=0xc0001e7518 sp=0xc0001e7468 pc=0xb0bc7f gvisor.dev/gvisor/pkg/sentry/syscalls/linux.remove(0xc00067ca80, 0xc000000000, 0x0, 0x0) pkg/sentry/syscalls/linux/sys_sem.go:243 +0x94 fp=0xc0001e7570 sp=0xc0001e7518 pc=0xdf45d4 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Semctl(0xc00067ca80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x12, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/sys_sem.go:160 +0x3c5 fp=0xc0001e7720 sp=0xc0001e7570 pc=0xdf39e5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00067ca80, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/kernel/task_syscall.go:104 +0x453 fp=0xc0001e79c0 sp=0xc0001e7720 pc=0xd40c93 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00067ca80, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc00067d35f, 0xc00067ca80) pkg/sentry/kernel/task_syscall.go:239 +0xb4 fp=0xc0001e7a98 sp=0xc0001e79c0 pc=0xd42474 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00067ca80, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x4790cc, 0x4860df) pkg/sentry/kernel/task_syscall.go:199 +0x10f fp=0xc0001e7b40 sp=0xc0001e7a98 pc=0xd41d6f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00067ca80, 0x2, 0xc00067ca80) pkg/sentry/kernel/task_syscall.go:174 +0x214 fp=0xc0001e7cb0 sp=0xc0001e7b40 pc=0xd414f4 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc00067ca80, 0x1c4e2a0, 0x0) pkg/sentry/kernel/task_run.go:282 +0x12c7 fp=0xc0001e7ed0 sp=0xc0001e7cb0 pc=0xd2d467 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00067ca80, 0xb) pkg/sentry/kernel/task_run.go:97 +0x393 fp=0xc0001e7fd0 sp=0xc0001e7ed0 pc=0xd2b593 runtime.goexit() src/runtime/asm_amd64.s:1371 +0x1 fp=0xc0001e7fd8 sp=0xc0001e7fd0 pc=0x477501 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:328 +0x1a5