#18221: x / 2 doesn't work for x generator of free Q-algebra
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Reporter: darij | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.7
Component: coercion | Resolution:
Keywords: coercion, sd67, | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by SimonKing):
Note that in the error message it says:
{{{
RuntimeError: There is a BUG in the coercion model:
Action found for R <built-in function div> S does not have
the correct domains
R = Free Algebra on 1 generators (x,) over Rational Field
S = Integer Ring
(should be Free Algebra on 1 generators (x,) over Rational
Field, Rational Field)
}}}
Hence, for a change we do not have the problem of non-unique unique
parents or parents that have prematurely been garbage collected, but we
have a genuinely wrong domain. The coercion model expects rational field
but gets integer ring.
--
Ticket URL: <http://trac.sagemath.org/ticket/18221#comment:6>
Sage <http://www.sagemath.org>
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