Crash: std::bad_alloc

This has happened twice to me now, so I thought I'd bring it up. This error occurred once when I was watching a replay and again when I was spectating a game. In both cases, the game was well under way, about 15 to 25 minutes in. There was also a lot of activity going on. Then, the game crashed and popped up with a window saying "std::bad_alloc." What causes this error and how can I rectify it?

Okay. If any devs want to take a look at the infolog immediately after the crash, they can download the file here:

http://www.2shared.com/document/9xt1So1Q/infolog.html