panic: unable to find an index for ID: 0 goroutine 239136 [running]: panic(0x105cd00, 0xc0a4a12f30) GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc08cd07928 sp=0xc08cd07860 pc=0x437c65 gvisor.dev/gvisor/pkg/sentry/kernel/semaphore.(*Registry).Remove(0xc000996a98, 0xc000000000, 0xc00090e900, 0x0, 0x0) pkg/sentry/kernel/semaphore/semaphore.go:222 +0x185 fp=0xc08cd07998 sp=0xc08cd07928 pc=0x85e5a5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.remove(0xc0a554a000, 0x0, 0x203025, 0x203025) pkg/sentry/syscalls/linux/sys_sem.go:243 +0x69 fp=0xc08cd079d8 sp=0xc08cd07998 pc=0xa38aa9 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Semctl(0xc0a554a000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x96b0e, 0xc08cd07be4, 0x40000002, ...) pkg/sentry/syscalls/linux/sys_sem.go:160 +0x2dc fp=0xc08cd07b00 sp=0xc08cd079d8 pc=0xa3817c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0a554a000, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x124e7a0, ...) pkg/sentry/kernel/task_syscall.go:104 +0x13c fp=0xc08cd07c60 sp=0xc08cd07b00 pc=0x9bf3fc gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0a554a000, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) pkg/sentry/kernel/task_syscall.go:239 +0x66 fp=0xc08cd07ce8 sp=0xc08cd07c60 pc=0x9c0586 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0a554a000, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0a4ad7120, 0xc0a4ad7080) pkg/sentry/kernel/task_syscall.go:199 +0x98 fp=0xc08cd07d48 sp=0xc08cd07ce8 pc=0x9c0178 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0a554a000, 0x2, 0xc0a554a000) pkg/sentry/kernel/task_syscall.go:174 +0x15c fp=0xc08cd07e18 sp=0xc08cd07d48 pc=0x9bfb1c gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0a554a000, 0x13b4ae0, 0x0) pkg/sentry/kernel/task_run.go:282 +0xca5 fp=0xc08cd07f60 sp=0xc08cd07e18 pc=0x9b46e5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0a554a000, 0x2504) pkg/sentry/kernel/task_run.go:97 +0x1af fp=0xc08cd07fd0 sp=0xc08cd07f60 pc=0x9b334f runtime.goexit() src/runtime/asm_amd64.s:1371 +0x1 fp=0xc08cd07fd8 sp=0xc08cd07fd0 pc=0x472821 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:328 +0xfe