directly fix inference due to logger issues

Author: ChrisRackauckas

src/solve.jl

@@ -47,15 +47,19 @@ function solve_call(_prob,args...;merge_callbacks = true, kwargs...)
     kwargs = merge(values(_prob.kwargs), kwargs)
   end
 
+  T = Core.Compiler.return_type(__solve,Tuple{typeof(_prob),map(typeof, args)...})
+
   progress = get(kwargs, :progress, false)
   if progress
     logger = default_logger(Logging.current_logger())
-    maybe_with_logger(logger) do
+    x = maybe_with_logger(logger) do
       __solve(_prob,args...; kwargs...)
     end
+    return x::T
   else
-    __solve(_prob,args...; kwargs...)
+    __solve(_prob,args...; kwargs...)::T
   end
+
 end
 
 function solve(prob::DEProblem,args...;kwargs...)

test/downstream/inference.jl

@@ -0,0 +1,11 @@
+using OrdinaryDiffEq, Test
+function lorenz(du,u,p,t)
+ du[1] = 10.0(u[2]-u[1])
+ du[2] = u[1]*(28.0-u[3]) - u[2]
+ du[3] = u[1]*u[2] - (8/3)*u[3]
+end
+u0 = [1.0;0.0;0.0]
+tspan = (0.0,1.0)
+prob = ODEProblem(lorenz,u0,tspan)
+sol = solve(prob,Tsit5())
+@inferred solve(prob,Tsit5())

test/runtests.jl

@@ -38,6 +38,7 @@ if !is_APPVEYOR && GROUP == "Downstream"
     @time @safetestset "Null Parameters" begin include("downstream/null_params_test.jl") end
     @time @safetestset "Ensemble Simulations" begin include("downstream/ensemble.jl") end
     @time @safetestset "Ensemble Analysis" begin include("downstream/ensemble_analysis.jl") end
+    @time @safetestset "Inferece Tests" begin include("downstream/inference.jl") end
     @time @safetestset "Default linsolve with structure" begin include("downstream/default_linsolve_structure.jl") end
     @time @safetestset "Callback Merging Tests" begin include("downstream/callback_merging.jl") end
     @time @safetestset "LabelledArrays Tests" begin include("downstream/labelledarrays.jl") end