Lorenz Minder on Thu, 21 May 2009 06:06:20 +0200

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Re: Broken exception handling in gp_read_str()


> On Thu, May 14, 2009 at 04:11:13AM +0200, Lorenz Minder wrote:
> > I can't seem to catch errors of gp_read_str() with the TRY / CATCH
> > mechanism anymore.  I don't know when this broke, but it worked in PARI
> > 2.4.2 and earlier.
> Actually, catching runtime errors work, but not syntax errors, this is
> the change below:
> 2.4.3C12- syntax errors, SIGINT and "PARI bugs" are no longer trapped
> The whole TRY / CATCH facility need to be improved, see bug
> http://pari.math.u-bordeaux.fr/Bugs/329

Thanks for these references.

I'm not completely sure if that is a temporary change, or if the syntax
errors will never be trapped any more?  If the latter, how do I make sure
my program does not terminate if I give a wrong string to gp_read_str()?

My issue is that I'm binding the PARI functionality into Python via a
module which sometimes calls gp_read_str() with user supplied data.
Crashing the Python interpreter for a user error is of course a rather
serious problem.  For versions <= 2.4.2 I could catch the error and
throw a Python exception instead.

How can I restore that functionality with newer PARI versions?

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