That happens in SPAZ when your hull gets smashed up enough. You just helplessly watch your ship lose a 1/3 of it's crew to the vacuum. It's nice to see though, and I'm sure I'm not the only one that goes around running over frozen crew members. >.>
Vacuum should be the most killing cause in a spaceship battle. I mean, you're dodging HE shells that will cause Hull breaches which causes vacuum to flood the areas where your crew are, causing them either to implode, suffocate, or get sucked out and frozen to death. Horrible fates
I think a large HE shell impacting a crewed area will kill significantly more than the vacuum does, these shells are the size of bombs that level entire city blocks on Earth. Shockwaves get focused by the small rooms inside a ship and cause enough overpressure to instantly kill anyone in those rooms.
Also freezing to death in space is pretty unlikely. Vaccum is great for heat insulation, just like a thermos flask. Most cooling happens through diffusion, not radiation in an atmosphere and you lose the diffusion in space. If you're exposed to e.g. direct sunlight you'll build up more heat than you radiate. That's why heat will likely be a problem for real space combat.