#8029: Defect: Power series over a polynomial ring with real coefficients
------------------------------+---------------------------------------------
Reporter: eduenez | Owner: AlexGhitza
Type: defect | Status: new
Priority: minor | Milestone:
Component: algebra | Keywords: polynomial ring, power series
Author: Eduardo Dueñez | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Description changed by eduenez:
Old description:
> Sage 4.3 in a PowerPC Mac:
> {{{
> sage: A.<x> = RR['x']
> sage: B.<t> = PowerSeriesRing(A) # B = R[x][[t]]
> sage: 1. + O(t)
> 1.00000000000000 + O(t)
> sage: 1. + O(t^2)
> 1.00000000000000 + O(t^2)
> sage: 1. + O(t^3)
> 1.00000000000000 + O(t^3)
> sage: 1. + O(t^4)
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0xffffffe4
> __pyx_f_4sage_5rings_10polynomial_26polynomial_real_mpfr_dense_19PolynomialRealDense__add_
> (__pyx_v_left=0x14096f8, __pyx_v__right=0x10fc6260,
> __pyx_skip_dispatch=0) at
> sage/rings/polynomial/polynomial_real_mpfr_dense.c:5360
> 5360 sage/rings/polynomial/polynomial_real_mpfr_dense.c: No such file
> or directory.
> in sage/rings/polynomial/polynomial_real_mpfr_dense.c
> }}}
>
> NOTE: Bug was not present in Sage v2.9.1, but was already present in v3.4
> (running on 64-bit Opteron). It is ''not'' triggered over QQ as
> basefield.
New description:
Sage 4.3 in a PowerPC Mac:
{{{
sage: A.<x> = RR['x']
sage: B.<t> = PowerSeriesRing(A) # B = R[x][[t]]
sage: 1. + O(t)
1.00000000000000 + O(t)
sage: 1. + O(t^2)
1.00000000000000 + O(t^2)
sage: 1. + O(t^3)
1.00000000000000 + O(t^3)
sage: 1. + O(t^4)
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0xffffffe4
__pyx_f_4sage_5rings_10polynomial_26polynomial_real_mpfr_dense_19PolynomialRealDense__add_
(__pyx_v_left=0x14096f8, __pyx_v__right=0x10fc6260, __pyx_skip_dispatch=0)
at sage/rings/polynomial/polynomial_real_mpfr_dense.c:5360
5360 sage/rings/polynomial/polynomial_real_mpfr_dense.c: No such file
or directory.
in sage/rings/polynomial/polynomial_real_mpfr_dense.c
}}}
NOTE: Bug was not present in Sage v2.9.1, but was already present in v3.4
(running on 64-bit Linux). It is ''not'' triggered over QQ as basefield.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8029#comment:1>
Sage <http://www.sagemath.org>
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