[Python-Dev] Reference cycles in Exception.__traceback__

[Yury Selivanov]

On 2014-03-05, 11:37 AM, Victor Stinner wrote:
> [snip]
>
> I tried to write "views" of the traceback (and frames), but
> Exception.__traceback__ rejects types other than traceback and
> traceback instances cannot be created. It's possible to store the
> traceback somewhere else and set Exception.__traceback__ to None, but
> there is still the problem with chained exceptions.
>

Can we allow instantiation of types.FrameType and
types.TracebackType?  If it's allowed, we can write
a simple code, that will recreate tracebacks with
cleaned-up frames without references to locals etc.

Yury