[Python-Dev] What is the precise problem? [was: Reference cycles in Exception.__traceback__]

[Maciej Fijalkowski]

On Mon, Mar 10, 2014 at 3:23 PM, Victor Stinner
<victor.stinner at gmail.com> wrote:
> 2014-03-10 13:11 GMT+01:00 Maciej Fijalkowski <fijall at gmail.com>:
>> It was agreed long time ago that the immediate finalization is an
>> implementation specific detail and it's not guaranteed. You should not
>> rely on __del__s being called timely one way or another. Why would you
>> require this for the program to work correctly in the particular
>> example of __traceback__?
>
> For asyncio, it's very useful to see unhandled exceptions as early as
> possible. Otherwise, your program is blocked and you don't know why.
>
> Guido van Rossum suggests to run gc.collect() regulary:
> http://code.google.com/p/tulip/issues/detail?id=42
>
> Victor

twisted goes around it by attaching errback by hand. Would that work for tulip?