Random crash during gameplay - not sure if this is the correct place to put this crash report, but meh. I'm putting it here anyway.

I was flying around (in Creative Mode) in a world where almost all blocks except ores had been removed, in order to see where the ores would be if I recreated the world. Whilst I was flying around, the game randomly crashed.
I tried again, and the same result. Thus the two crash reports.
I also attached the compressed version of the world in question, for additional help.