I've not found voids in G10 (yet... knock on wood) but I have seen them in every other non-metal material. Like Stacy said, just fill with CA (superglue) and continue. If the void is deep or large as sometimes happens with stabilized wood, you may need to drip CA in there several times.
Not long ago I had one stabilized-maple burl handle on a chef's knife with so many voids, and they were so noticeable, that it took a couple days to get them filled up to where I could finish sanding the handle. Mainly because I applied just a drop or two each time and let it cure one "layer" at a time while I worked on other stuff. But that's pretty rare.