Hello Volker,

I talked to Pascal in Bristol fwiw, and apparently the bnr stuff isn't 
> wrapped in Sage. We created at quick&dirty Cython wrapper for LMFDB, but it 
> would probably be nice to push that into Sage.
>

Yes, that is a good example.
 

> On a related note, Jeroen started a thread about the error handler thing 
> on pari-dev 
> http://pari.math.u-bordeaux.fr/archives/pari-dev-1308/msg00014.html and 
> we'll hopefully get a cleaner hook.
>

Did you see my recent patch on #9640?  It uses the existing callback, and I 
think this approach is quite acceptable after all, since it allows us to 
catch any error messages printed to stderr by PARI.  The alternative would 
be to add another hook before those messages are printed, but that has a 
redundant feel to it and doesn't give us the error text.  I don't think 
adding a second hook would be worth the effort.

Peter

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