> Consider:
>    r(a()/b(),
>      d()/e(),
>      g=h()/i(),
>      )

I tried to run this, with e() == 0, and got:
Traceback (most recent call last):
  File "deleteme.py", line 6, in <module>
    d()/e(),
ZeroDivisionError: division by zero

This is actually a good point, because in this specific case the traceback is correct, and showing all the lines would make things worse.


> If 1 of the expressions raises an error, do you really want
> all 500 lines in the traceback?

I assume it wouldn't be too difficult to limit the output to 3-5 lines max.

Someone should try to fiddle with the code I indicated in msg144813, and see what can be done.  If there are enough informations it might be possible to keep reporting a single line for the aforementioned case, but report more lines for the cases listed in the other messages; if there aren't enough informations we will have to abandon the idea (or find a way to retrieve them).