# Error while integrate using algorithm='sympy' (bug)

Hello! I found next bug:

```
var('x, y')
integrate(y, y, 0, 8*log(x))
RuntimeError: ECL says: Error executing code in Maxima: defint: upper
limit of integration must be real; found 8*log(x)
```

Then I decided to use sympy:

```
var('x, y')
integrate(y, y, 0, 8*log(x), algorithm='sympy')
32*log(x)^2
```

Nice! But when I replaced 0 --> 0.5 (int --> real):

```
var('x, y')
integrate(y, y, 0.5, 8*log(x), algorithm='sympy')
AttributeError: 'sage.rings.real_mpfr.RealLiteral' object has no
attribute '_sympy_'
```

M.... I opened real_mpfr.pyx and added:

```
1314 def _sympy_(self):
1315 """
1316 Return sympy object.
1317 AUTHORS: #########################
1318 """
1319 import sympy
1320 return(sympy.symplify(float(self)))
```

(I added line numbers in my code above and remove authors informations (that is about me)) Then I tryed to load:

```
load('/home/andrei/Programs/Sage/sage-5.10/devel/sage/sage/rings/real_mpfr.pyx')
```

And there are many-many errors while compilling... Help me please! Thanks.