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Thanks for reporting, actually, it is a known bug, see trac ticket 14274.

Thanks for reporting, actually, it is a known bug, see trac ticket 14274.

Thanks for reporting, actually, reporting!

Actually, it is a known bug, see trac ticket 14274.

Sympy seems not able to solve it either, though it is able to see that the integral of 1/x diverges at 0.

sage: import sympy
sage: x = sympy.Symbol('x')
sage: from sympy import oo
sage: sympy.integrate(1/x,(x,0,oo))
nan