I am a complete idiot and I suck at not being a complete idiot

Turns out the problem causing the infinite loop in the Brainfuck interpreter was, well, an infinite loop. I know, I know, it must've been hard for me to catch. Please hold the applause.

I had forgotten to implement the somewhat important part where, you know, the while loop actually works. I had forgotten to add a check to see if the current cell is 0, thus making the loop somewhat useless.

Now I'll go try some other code and probably find new bugs.
Oh boy.