This was not an issue in my local machine, but failed on the Github CI. It could be due to compiler optimizations. Case 69 used to look like this:

```python
 Elemwise{Composite{(i0 * tan(i0) * tan(i0) * i1)}} [id C]
 |x [id A]
 |x [id A]
 ```

 And now looks like this
 ```python
 Elemwise{Composite{(i0 * tan(i0) * tan(i0) * i0)}} [id C]
 |x [id A] [None]
 ```