memory leak with math.log/exp

When running

```
import math

def calc(data):
    #data = tuple(math.exp(1) for v in data)
    data = [math.log(1) for v in data]
    return data

data = list(range(16))
for i in range(10000):
    data = calc(data)

print(data)
```

I am getting

```
MemoryError: 
```

Is that to be expected with current implementation of GC?
