#18818: Segmentation fault on computations in AA, exactify()
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Reporter: mkoeppe | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.8
Component: number fields | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Basic arithmetic with AA can lead to enormous expression trees, which
easily leads to recursion depth errors and excessive memory use.
{{{
x = 3*AA(sqrt(2))/200
moves = [ 1/60, 3*AA(sqrt(2))/200, -AA(sqrt(3))/1000 ]
for i in xrange(1000000): x = x + moves[randint(0, len(moves)-1)];
print x
12064.933787495?
x.exactify()
/Users/mkoeppe/bin/sage: line 134: 41236 Segmentation fault: 11
"$SAGE_ROOT/src/bin/sage" "$@"
}}}
(I mentioned this to some developers during the Sage Days in Davis in
2013, but didn't follow up on it.)
might be related to #16222
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Ticket URL: <http://trac.sagemath.org/ticket/18818>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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