embotech/ecos

ECOS BB segfaults when no integer/boolean variables

Closed this issue · 5 comments

SteveDiamond commented

ECOS BB segfaults if both num_bool_vars=0 and num_int_vars=0. There should be at least an error instead of a segfault. Ideally it would just call normal ecos and solve the problem.

Here's some code to trigger the issue:

from cvxpy import *
x = Variable()
prob = Problem(Minimize(x), [x >= 2])
prob.solve(solver=ECOS_BB)
hanwang commented

Hi Steve,

Can you link me to the ecos_bb wrapper in CVXPY? The way the python interface is implemented, it should switch automatically between ecos_bb and ecos depending on if you pass in the lists of integer and boolean variables.

SteveDiamond commented

It's here:

https://github.com/cvxgrp/cvxpy/blob/master/cvxpy/problems/solvers/ecos_bb_intf.py

It's passing in empty lists for bool_var_idx and int_var_idx.

hanwang commented

Thanks Steve, please pull the lastest ecos-python and rebuild. I just pushed a patch that should solve this issue.

hanwang commented

Can I close this issue now?

SteveDiamond commented

Yes, that's fine.

On Tue, Jan 13, 2015 at 1:28 PM, Han Wang notifications@github.com wrote:

Can I close this issue now?

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