#19523: Adding constraints for the wrong MILP crashes Sage
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Reporter: jdemeyer | Owner:
Type: defect | Status: new
Priority: major | 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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Comment (by mkoeppe):
While `MIPVariable` objects know which MIP they belong to,
their "components" gotten by `p[0]` etc. are elements of
`LinearFunctionsParent(base_ring)`, and do not remember their MIP (nor
even their name).
So with the current design it does not seem possible to catch the error of
adding constraints to the wrong MIP.
So unfortunately only lower-level error checking, catching out-of-bounds
indices, is possible.
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Ticket URL: <http://trac.sagemath.org/ticket/19523#comment:4>
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