[feedback][eldritchv0.3] Broke the bot

**Is your feedback related to a problem? Please describe.**

REPL hangs when this is run:
```
>>> a = []
>>> for i in range(1,100):
...     a.append(a)
```

```
>>> a = {}
>>> for i in [1]:
...     a[i] = a
```

**Describe the solution you'd like**
Avoid crashing.