Something funny with free modules

[robertwb]

sage: W = (ZZ^2).span([(1/2,1/2), (0,1)]); W
Free module of degree 2 and rank 2 over Integer Ring
Echelon basis matrix:
[1/2 1/2]
[  0   1]
sage: V = (ZZ^2).span([(1/2,1/2), (0,2)]); V
Free module of degree 2 and rank 2 over Integer Ring
Echelon basis matrix:
[1/2 1/2]
[  0   2]
sage: W(V.gen(0))
Traceback (most recent call last):
...
TypeError: no coercion of this rational to integer

CC: @jasongrout

Component: linear algebra

Issue created by migration from https://trac.sagemath.org/ticket/3469

[robertwb]

comment:1

Also

sage: type(V.gen())
<type 'sage.modules.vector_rational_dense.Vector_rational_dense'>
sage: type(V([1,2]))
<type 'sage.modules.vector_integer_dense.Vector_integer_dense'>

[robertwb]

comment:2

This seems to be the real issue:

sage: V([1/2,1/2])
Traceback (most recent call last):
...
TypeError: no coercion of this rational to integer

[boothby]

comment:4

Seems to work now.