using SciMLBase, Test
function fiip(du, u, p, t)
	du[1] = dx = p[1] * u[1] - p[2] * u[1] * u[2]
	du[2] = dy = -p[3] * u[2] + p[4] * u[1] * u[2]
end
p = [1.5, 1.0, 3.0, 1.0];
u0 = [1.0; 1.0];
dp = similar(p)
@inferred ODEProblem(fiip, u0, (0.0, 10.0), p) # fails
@inferred ODEProblem{true}(fiip, u0, (0.0, 10.0), p) #passes