fix super type

Author: ChrisRackauckas

src/common.jl

@@ -111,7 +111,7 @@ function SciMLBase.init(prob::LinearProblem, alg::Union{SciMLLinearSolveAlgorith
     Tc = typeof(cacheval)
 
     A = alias_A ? A : deepcopy(A)
-    b = if b isa SparseArray && !(A isa Diagonal)
+    b = if b isa SparseArrays.AbstractSparseArray && !(A isa Diagonal)
         Array(b) # the solution to a linear solve will always be dense!
     elseif alias_b
         b

src/default.jl

@@ -53,7 +53,7 @@ end
     end
 else
     function defaultalg(A::SparseMatrixCSC, b, ::OperatorAssumptions{true})
-        KrylovJL_GMRES()
+        SparspakFactorization()
     end
 end
 
@@ -152,20 +152,6 @@ function defaultalg(A, b, ::OperatorAssumptions{true})
     alg
 end
 
-function defaultalg(A::SparseMatrixCSC, b, ::OperatorAssumptions{true})
-    # If GPL libraries are loaded, then use SuiteSparse. Otherwise Sparspak
-    if INCLUDE_SPARSE
-        if length(b) <= 10000
-            alg = KLUFactorization()
-        else
-            alg = UMFPACKFactorization()
-        end
-    else
-        alg = SparspakFactorization()
-    end
-    alg
-end
-
 function defaultalg(A, b, ::OperatorAssumptions{false})
     QRFactorization()
 end