[OS] Problem with many repeated quadratic coefficients segfaulting on completion

[Tony Kelman]

I've tried this with OS 2.10.0, trunk rev 5051, and 2.9.2, all of them solve 
this problem successfully but give a "During startup program terminated with 
signal SIGSEGV, Segmentation fault." I can't get gdb to give me a useful 
backtrace even when OS is configured with --enable-debug, it seems like the 
problem is actually getting solved successfully since I get an osrl output 
with an optimal solution from Ipopt. And this only seems to happen on Ubuntu 
15.04, when I run the same problem on 14.04 it's fine. So this may be 
version-of-GCC-dependent.

The osil file is available at 
https://gist.github.com/anonymous/3b952ed1717b73eae58d/raw/problem.osil, 
it's an 8-variable QP but many of the quadraticCoefficients are repeated 
many times from the modeling layer. We don't have a presolve right now to 
eliminate those, so the duplication may be causing this issue.

Let me know if I can provide any more info.

Thanks,
Tony