[Cbc] Using SOS1 getting malloc: pointer being freed was not allocated

[Rhavar]

Since that's a giant-ass model, here's a tiny one that exhibits the same sort of behavior:

https://gist.github.com/RHavar/47b912d7250a17075ba8e7aeefa77a34

results in: Segmentation fault: 11

-Ryan

> -------- Original Message --------
> Subject: Using SOS1 getting malloc: pointer being freed was not allocated
> Local Time: January 1, 2018 10:10 AM
> UTC Time: January 1, 2018 4:10 PM
> From: rhavar at protonmail.com
> To: cbc at list.coin-or.org <cbc at list.coin-or.org>
>
> Example:
>
> https://gist.github.com/RHavar/58d232e8d353fabd9a5cd1060cf996a6
>
> Reproduce with  `cbc problem.lp solve`
>
> Running with:
>
> Welcome to the CBC MILP Solver
>
> Version: 2.9.6
>
> Build Date: Dec 22 2017
>
> ends up with:
>
> cbc(19780,0x7fffb8236340) malloc: *** error for object 0x7fb692934e40: pointer being freed was not allocated
>
> *** set a breakpoint in malloc_error_break to debug
>
> Abort trap: 6
>
> -Ryan
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