Empty Model Segfault (Julia v0.6)

[ccoffrin]

With Julia v0.6.4, JuMP master, SCS v0.4.0, and MOI v0.6.1. The following code results in a segfault for me,

using JuMP; using SCS

using MathOptInterface
const MOI = MathOptInterface
const MOIU = MOI.Utilities

m = Model()

MOIU.resetoptimizer!(m, SCS.Optimizer())
JuMP.optimize!(m)

My output is the following,

julia> JuMP.optimize!(m)
m and n must both be greater than 0; m = 0, n = 0
ERROR: Validation returned failure

signal (11): Segmentation fault: 11
while loading no file, in expression starting on line 0
scs_solve at /workspace/srcdir/scs-2.0.2/src/scs.c:838
Allocations: 7728582 (Pool: 7727033; Big: 1549); GC: 14
Segmentation fault: 11

[ccoffrin]

Another example with similar behavior.

using JuMP; using SCS

using MathOptInterface
const MOI = MathOptInterface
const MOIU = MOI.Utilities

m = Model()

X = @variable(m, [1:3, 1:3], Symmetric)
y = @variable(m, [i in 1:3])

@constraint(m, X in PSDCone())

MOIU.resetoptimizer!(m, SCS.Optimizer())
JuMP.optimize!(m)

[blegat]

It was already the case with SCS with MathProgBase and JuMP v0.18, see e.g. 41a1a6d

[odow]

Is this a JuMP issue or an SCS issue?

[blegat]

It is an SCS issue, it segfaults for empty model.
Closes in favor of jump-dev/SCS.jl#122