sympy/sympy — pull request #2557 by zanzibar7 (2013-10-28 22:00:51+00:00)
Title: Bug piecewise

This corrects a bug in the integration of a piecewise function. For example, try Integral(exp(x*t),(t,0,y)).doit()

To the best of my knowledge, this does not seem to be covered by any of the current issues, but the
intention of replacing the Piecewise integration algorithm may make it obsolete at some point.