#12217: Finite field polynomials allow division by zero
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Reporter: johanbosman | Owner: AlexGhitza
Type: defect | Status: needs_work
Priority: major | Milestone: sage-5.13
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Peter Bruin | Reviewers: Jeroen Demeyer
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by pbruin):
Something else that bothers me is the implementation of
`PolynomialElement.__div__()`. When computing `x/y`, it first tries to
coerce `y` to the base ring and multiply the polynomial `x` by `~y`. This
can fail either because the coercion fails or because `y = 0`. In both
cases, the computation is retried, but this is useless if `y = 0`; after
all, we will certainly get a `ZeroDivisionError` again. New patch now
testing.
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Ticket URL: <http://trac.sagemath.org/ticket/12217#comment:11>
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