Comment #2 on issue 2044 by smichr: log(exp(x)) != x unless x is real http://code.google.com/p/sympy/issues/detail?id=2044
yes, uncommenting that line makes the true conditions for simplification apply and then the code breaks.
Again, here is a perfect place for symbols to be used intelligently in a routine: if the limits are real then if generic symbols are used they should be replaced with ones having the proper assumption. All the failing tests except one involving and O(log(x*y)) calculation pass with assumptions applied. I'm trying to see why the O() test fails.
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