evaluation of coefficients of polynomials

[fchapoton]

It seems that substitution inside coefficients of a polynomial forgets to change the dominant term :

sage: rng=PolynomialRing(QQ,'q')
sage: q=rng.gen()
sage: x=PolynomialRing(rng,'x').gen()
sage: po=q+(1+q)*x+(1+q+q**2)*x**2+(2+q)*x**3
sage: po(q=1)
(q + 2)*x^3 + 3*x^2 + 2*x + 1

Same behaviour in 4.8 and 5.0rc0

Fixed by #3979.

Component: algebra

Keywords: polynomials

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/12931

[sagetrac-fwclarke]

comment:2

This is corrected in the latest patch for #3979; see the changes to sage/rings/polynomial/polynomial_element.pyx. A new patch which should allow that ticket to be closed will be posted soon.

[sagetrac-fwclarke]

comment:3

Replying to @sagetrac-fwclarke:

A new patch [...] will be posted soon.

It has been now.

[tscrim]

Reviewer: Travis Scrimshaw