I hit a similar thing in some code I was writing, and ended up debugging it for about 5 hours. Couldn't figure out why when some tests ran, one of them would ju

I hit a similar thing in some code I was writing, and ended up debugging it for about 5 hours. Couldn't figure out why when some tests ran, one of them would just die. Turns out I forgot to use 'var' in a library function, and the tests were running concurrently, and so one clobbered the other. It was not fun. Been using JSHint ever since.