Upstream does not allow the input transformer to fail, so either its a
not-yet-implemented feature in IPython or we are abusing the IPython
mechanism to parse the input where only trivial transformations should be
done. Can you post this to the ipython mailinglist?
On Wednesday, July 24, 2013 12:24:08 AM UTC-4, Travis Scrimshaw wrote:
>
> Hey everyone,
> I made a typo and was able to crash sage:
>
> R.<t> = QQ{]
>
> The (currently a blocker IMHO) ticket is here
> http://trac.sagemath.org/ticket/14961. I've put up a patch which just
> hacks around the problem by catching the (new) SyntaxError the mismatched
> parenthesis throw. The main problem seems to lie in that ipython will crash
> when any exception is thrown from the preparser. I'm thinking this is more
> of an upstream issue...?
>
> Best,
> Travis
>
>
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