make PageSlice.Slice not crash at any case
make PageSlice.Slice not crash at any case

piranha/gostatic,beni55/gostatic,greyhwndz/gostatic,zhuharev/gostatic,holic/gostatic,beni55/gostatic,piranha/gostatic,zhuharev/gostatic,krpors/gostatic,greyhwndz/gostatic,krpors/gostatic,sisteamnik/gostatic,sisteamnik/gostatic,holic/gostatic