panic: runtime error: index out of range [1] with length 1

goroutine 769678 [running]:
panic(0x14e4cc0, 0xc00126e0c0)
	GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc000e091e8 sp=0xc000e09130 pc=0x4360bd
runtime.goPanicIndex(0x1, 0x1)
	GOROOT/src/runtime/panic.go:88 +0xa3 fp=0xc000e09230 sp=0xc000e091e8 pc=0x433db3
gvisor.dev/gvisor/pkg/sentry/pgalloc.(*MemoryFile).forEachMappingSlice(0xc00041a000, 0x7ff74000, 0x7ffff000, 0xc000e09380, 0xffffffffffffffff, 0x0)
	pkg/sentry/pgalloc/pgalloc.go:662 +0x2e9 fp=0xc000e092d0 sp=0xc000e09230 pc=0x85ed29
gvisor.dev/gvisor/pkg/sentry/pgalloc.(*MemoryFile).MapInternal(0xc00041a000, 0x7ff74000, 0x7ffff000, 0x7f000100, 0x7ffff000, 0x0, 0x0, 0x8b000, 0xc00000, 0x40)
	pkg/sentry/pgalloc/pgalloc.go:644 +0xf3 fp=0xc000e093e8 sp=0xc000e092d0 pc=0x85e6d3
gvisor.dev/gvisor/pkg/sentry/pgalloc.(*MemoryFile).AllocateAndFill(0xc00041a000, 0x8b000, 0x1, 0x1770ec0, 0xc000fb0120, 0x7f95509b4000, 0xffffffffffffffff, 0x0, 0x8b000)
	pkg/sentry/pgalloc/pgalloc.go:507 +0xf1 fp=0xc000e09478 sp=0xc000e093e8 pc=0x85d351
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAsInternalLocked(0xc000dd8000, 0x1794340, 0xc000df8000, 0xc000dd8080, 0x4, 0xc89000, 0xc8a000, 0xc000000101, 0x4477f7, 0x128cea0, ...)
	pkg/sentry/mm/pma.go:343 +0x13de fp=0xc000e09b38 sp=0xc000e09478 pc=0xa8c6be
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAsLocked(0xc000dd8000, 0x1794340, 0xc000df8000, 0xc000dd8080, 0x4, 0xc89000, 0xc8a000, 0x101, 0xc000dd8080, 0x5, ...)
	pkg/sentry/mm/pma.go:119 +0xff fp=0xc000e09c08 sp=0xc000e09b38 pc=0xa8aa5f
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).HandleUserFault(0xc000dd8000, 0x1794340, 0xc000df8000, 0xc89948, 0x2000101, 0x7f3d6a5e1a10, 0xc0014b2200, 0x101)
	pkg/sentry/mm/syscalls.go:57 +0x1ca fp=0xc000e09ce0 sp=0xc000e09c08 pc=0xaa745a
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000df8000, 0x1771580, 0x0)
	pkg/sentry/kernel/task_run.go:288 +0xf4e fp=0xc000e09ee8 sp=0xc000e09ce0 pc=0xb373de
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000df8000, 0x80ab)
	pkg/sentry/kernel/task_run.go:92 +0x321 fp=0xc000e09fd0 sp=0xc000e09ee8 pc=0xb35841
runtime.goexit()
	src/runtime/asm_amd64.s:1373 +0x1 fp=0xc000e09fd8 sp=0xc000e09fd0 pc=0x46b901
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:318 +0x19e