# Behavior of symbolic_sum changed?

Consider

```
from sage.calculus.calculus import symbolic_sum
n = var('n')
print 1/(1 + symbolic_sum(factorial(n) * x^n, n, 1, oo))
```

Answer of Sage 7.4:

```
1/(x*hypergeometric((1, 2), (), x) + 1)
```

Answer of Sage 8.0:

```
ValueError: Computation failed since Maxima requested
additional constraints; ....
```