Merge pull request SciML#566 from SciML/ap/linsolve_adjoint

Fix literal_getproperty for LinearSolution

Author: ChrisRackauckas

Project.toml

@@ -1,7 +1,7 @@
 name = "SciMLBase"
 uuid = "0bca4576-84f4-4d90-8ffe-ffa030f20462"
 authors = ["Chris Rackauckas <[email protected]> and contributors"]
-version = "2.26.2"
+version = "2.26.3"
 
 [deps]
 ADTypes = "47edcb42-4c32-4615-8424-f2b9edc5f35b"

ext/SciMLBaseZygoteExt.jl

@@ -167,6 +167,15 @@ end
     sol.u, solu_adjoint
 end
 
+@adjoint function literal_getproperty(sol::SciMLBase.LinearSolution, ::Val{:u})
+    function solu_adjoint(Δ)
+        zerou = zero(sol.u)
+        _Δ = @. ifelse(Δ === nothing, zerou, Δ)
+        (SciMLBase.build_linear_solution(sol.cache.alg, _Δ, sol.resid, sol.cache),)
+    end
+    sol.u, solu_adjoint
+end
+
 @adjoint function literal_getproperty(sol::SciMLBase.OptimizationSolution,
         ::Val{:u})
     function solu_adjoint(Δ)