#11856: Raise an overflow error if the exponent of a multivariate polynomial
flows
over
-----------------------------------+----------------------------------------
Reporter: SimonKing | Owner: malb
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-4.7.2
Component: commutative algebra | Keywords: exponent overflow
Work_issues: | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies:
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Comment(by SimonKing):
The latest patch version checks ''both'' whether the exponent exceeds
max_exponent_size (which avoids some bugs that occur in Singular) ''and''
whether it is illegal in Singular (which avoids the bugs in Sage that led
to the creation of this ticket).
We now have
{{{
sage: x^2^30*x^2^30
Traceback (most recent call last):
...
OverflowError: Exponent overflow (2147483648).
}}}
I wonder whether the test, that became more expensive, led to an
inacceptable speed regression. That should be investigated.
The tests in sage/rings/polynomial pass for me. I don't know about the
rest. Needs review!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11856#comment:5>
Sage <http://www.sagemath.org>
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