Merge commit '999c3353f9d90d08607fdfd86cd3428480bfe715'

Author: jonniedie

Project.toml

@@ -1,7 +1,7 @@
 name = "ComponentArrays"
 uuid = "b0b7db55-cfe3-40fc-9ded-d10e2dbeff66"
 authors = ["Jonnie Diegelman <47193959+jonniedie@users.noreply.github.com>"]
-version = "0.12.2"
+version = "0.12.4"
 
 [deps]
 ArrayInterface = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"

src/compat/chainrulescore.jl

@@ -1,6 +1,6 @@
 function ChainRulesCore.rrule(::typeof(getproperty), x::ComponentArray, s::Union{Symbol, Val})
     function getproperty_adjoint(Δ)
-        zero_x = zero(x)
+        zero_x = ComponentArray(zeros(eltype(Δ), size(x)), getaxes(x))
         setproperty!(zero_x, s, Δ)
         return (ChainRulesCore.NoTangent(), zero_x, ChainRulesCore.NoTangent())
     end

test/autodiff_tests.jl

@@ -43,6 +43,11 @@ truth = ComponentArray(a = [32, 48], x = 156)
             (;c...,).x^2
         end[1]
     end
+
+    # Issue #148
+    ps = ComponentArray(;bias = rand(4))
+    out = Zygote.gradient(x -> sum(x.^3 .+ ps.bias), Zygote.seed(rand(4),Val(12)))[1]
+    @test out isa Vector{<:ForwardDiff.Dual}
 end