#19523: Adding constraints for the wrong MILP crashes Sage
--------------------------------------+-------------------------
Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: critical | Milestone: sage-6.10
Component: linear programming | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: #19525 | Stopgaps:
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Changes (by jdemeyer):
* dependencies: => #19525
Old description:
> {{{
> sage: p = MixedIntegerLinearProgram()
> sage: q = MixedIntegerLinearProgram()
> sage: q.add_constraint(p[0] <= 1)
> ------------------------------------------------------------------------
> Unhandled SIGABRT: An abort() occurred in Sage.
> This probably occurred because a *compiled* component of Sage has a bug
> in it and is not properly wrapped with sig_on(), sig_off().
> Sage will now terminate.
> ------------------------------------------------------------------------
> }}}
New description:
{{{
sage: p = MixedIntegerLinearProgram(solver="glpk")
sage: q = MixedIntegerLinearProgram(solver="glpk")
sage: q.add_constraint(p[0] <= 1)
------------------------------------------------------------------------
Unhandled SIGABRT: An abort() occurred in Sage.
This probably occurred because a *compiled* component of Sage has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Sage will now terminate.
------------------------------------------------------------------------
}}}
This ticket is to actually fix this problem or give a better error
message.
The fact that Sage crashes hard is handled at #19525.
--
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Ticket URL: <http://trac.sagemath.org/ticket/19523#comment:1>
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