panic: munmap(7fea2f400000, 200000)) failed: function not implemented

goroutine 438 [running]:
gvisor.dev/gvisor/pkg/sentry/platform/ptrace.(*subprocess).Unmap(0xc00090a0c0, 0x7fea2f400000, 0x200000)
	pkg/sentry/platform/ptrace/subprocess.go:628 +0x372
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).unmapASLocked(0xc000b0c000, 0x7fea2f400000, 0x7fea2f600000)
	pkg/sentry/mm/address_space.go:215 +0x7a
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAsInternalLocked(0xc000b0c000, 0xeae3e0, 0xc000b26000, 0xc000b0c080, 0xa, 0x7fea2f591000, 0x7fea2f592000, 0x101, 0x0, 0xc00138fd88, ...)
	pkg/sentry/mm/pma.go:357 +0x12da
DIAGNOSIS:
container sandbox is not running