Merge pull request #1155 from SciML/nulldense

Mark null ODE solutions as dense

Author: ChrisRackauckas

Project.toml

@@ -1,7 +1,7 @@
 name = "DiffEqBase"
 uuid = "2b5f629d-d688-5b77-993f-72d75c75574e"
 authors = ["Chris Rackauckas <[email protected]>"]
-version = "6.173.0"
+version = "6.173.1"
 
 [deps]
 ArrayInterface = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"

src/solve.jl

@@ -748,7 +748,7 @@ function build_null_solution(prob::AbstractDEProblem, args...;
 
     prob, success = hack_null_solution_init(prob)
     retcode = success ? ReturnCode.Success : ReturnCode.InitialFailure
-    build_solution(prob, nothing, ts, timeseries; retcode)
+    build_solution(prob, nothing, ts, timeseries; dense=true, retcode)
 end
 
 function build_null_solution(

test/downstream/null_de.jl

@@ -13,6 +13,7 @@ sys = structural_simplify(sys)
 prob = ODEProblem(sys, Pair[], (0, 10.0))
 sol = solve(prob, Tsit5())
 
+@test sol.dense
 @test sol[x] == [0.0, 0.0]
 @test sol[y] == [0.0, 0.0]