#20408: BinaryQF solve_integer can crash
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Reporter: Eric119 | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.2
Component: number theory | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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This was observed on !SageMathCloud cloud.sagemath.com, on April 9, 2016.
The solve_integer method of BinaryQF crashes in some cases. For instance,
{{{
BinaryQF([1, 0, 4]).solve_integer(10)
}}}
produces the error report
{{{
Error in lines 1-1
Traceback (most recent call last):
File "/projects/sage/sage-6.10/local/lib/python2.7/site-
packages/smc_sagews/sage_server.py", line 904, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File "", line 1, in <module>
File "/projects/sage/sage-6.10/local/lib/python2.7/site-
packages/sage/quadratic_forms/binary_qf.py", line 731, in solve_integer
for z in z2.sqrt(extend=False, all=True):
File "sage/rings/integer.pyx", line 5632, in
sage.rings.integer.Integer.sqrt
(/projects/sage/sage-6.10/src/build/cythonized/sage/rings/integer.c:35328)
raise ValueError, "square root of negative number not an integer"
ValueError: square root of negative number not an integer
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/20408>
Sage <http://www.sagemath.org>
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