I recently suggested on Python-ideas ( https://mail.python.org/pipermail/python-ideas/2016-April/039899.html ) to shrink long tracebacks if they were all the same noise (recursive calls). Seeing as the idea had a good reception, I went ahead and implemented a small patch for this.

It doesn't keep track of call chains, and I'm not sure if we want to implement that, as the performance decrease needed to store all of that might not be worth it. But then again, if an error happened performance is probably not a concern in this case.

I've never really coded in C before, so feedback is very much welcome.