I reported this bug 1,5 years ago:
https://groups.google.com/forum/#!topic/sage-devel/rvs5E6AEXVc
Not to point fingers, but you said: "The behavior is bad but I would not
call it a bug. You modified wrongly the vector." ;-)
Back then you proposed to change the semantics such that a vectors'
pare
Dear all,
I went into the following bug: it is possible to modify an entry of
vector whose parent is a submodule of R^n.
sage: V = VectorSpace(QQ, 3)
sage: M = V.subspace([(1,0,0,),(0,1,0)])
sage: v = M()
sage: v
(0, 0, 0)
sage: v[2] = 2 # bug
sage: v
(0, 0, 2)
sage: v.parent() is M
True
I op
