make copy times more specific

Author: ChrisRackauckas

src/RecursiveArrayTools.jl

@@ -45,7 +45,9 @@ module RecursiveArrayTools
         recursivecopy!(a[i],x)
       end
     else
-      if eltype(x) <: Number
+      if eltype(x) <: Number && x <: Array
+        # Have to check that it's <: Array or can have problems
+        # with abstract arrays like MultiScaleModels.
         push!(a,copy(x))
       else
         push!(a,deepcopy(x))