Thanks a lot ! That's perfectly clear...
Any hints on how to file a ticket for this issue ?
Le vendredi 25 octobre 2019 10:20:26 UTC+2, Nils Bruin a écrit :
>
> Yes, that's a bug. It happens in F(x).operator()._tderivative_ It
> differentiates the bounds in case those vary with the differentiation
> variable, and that does not work for "0". If you define
>
> var('y')
> F(x)=integrate(f(t),y,x)
>
> you get the right result (with y not being a function of t).
>
> The bounds should be checked for being constants before being
> differentiated.
>
>
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