Hi
i have a directory containing a directory `bug` and the python program `bad.py`.  The code for `bad.py` is
```
import os

os.chdir('bug')
print(7/0)
```

directory `bug` contains a file `bad.py` this file contents are
```
test 1
test 2
test 3
test 4
test 5
test 6
```

when i run the python script i get the error text
```
Traceback (most recent call last):
  File "bad.py", line 4, in <module>
    test 4
ZeroDivisionError: division by zero
```