Use eigencopy_oftype instead of copy_oftype (#140)

Fixes #139

src/eigenSelfAdjoint.jl

@@ -633,29 +633,35 @@ eigen2(A::Hermitian, tol = eps(float(real(one(eltype(A)))))) = eigen2!(copy(A),
 
 # First method of each type here is identical to the method defined in
 # LinearAlgebra but is needed for disambiguation
+const _eigencopy_oftype = if VERSION >= v"1.9"
+    LinearAlgebra.eigencopy_oftype
+else
+    LinearAlgebra.copy_oftype
+end
+
 function LinearAlgebra.eigvals(A::Hermitian{<:Real})
     T = typeof(sqrt(zero(eltype(A))))
-    return eigvals!(LinearAlgebra.copy_oftype(A, T))
+    return eigvals!(_eigencopy_oftype(A, T))
 end
 function LinearAlgebra.eigvals(A::Hermitian{<:Complex})
     T = typeof(sqrt(zero(eltype(A))))
-    return eigvals!(LinearAlgebra.copy_oftype(A, T))
+    return eigvals!(_eigencopy_oftype(A, T))
 end
 function LinearAlgebra.eigvals(A::Hermitian)
     T = typeof(sqrt(zero(eltype(A))))
-    return eigvals!(LinearAlgebra.copy_oftype(A, T))
+    return eigvals!(_eigencopy_oftype(A, T))
 end
 function LinearAlgebra.eigen(A::Hermitian{<:Real})
     T = typeof(sqrt(zero(eltype(A))))
-    return eigen!(LinearAlgebra.copy_oftype(A, T))
+    return eigen!(_eigencopy_oftype(A, T))
 end
 function LinearAlgebra.eigen(A::Hermitian{<:Complex})
     T = typeof(sqrt(zero(eltype(A))))
-    return eigen!(LinearAlgebra.copy_oftype(A, T))
+    return eigen!(_eigencopy_oftype(A, T))
 end
 function LinearAlgebra.eigen(A::Hermitian)
     T = typeof(sqrt(zero(eltype(A))))
-    return eigen!(LinearAlgebra.copy_oftype(A, T))
+    return eigen!(_eigencopy_oftype(A, T))
 end
 
 # Aux (should go somewhere else at some point)

test/eigenselfadjoint.jl

@@ -156,4 +156,12 @@ using Test, GenericLinearAlgebra, LinearAlgebra, Quaternions
             @test abs.(eigen(A).vectors) == abs.(eigen(T).vectors) == abs.(eigen(A; sortby=LinearAlgebra.eigsortby).vectors) == abs.(eigen(T; sortby=LinearAlgebra.eigsortby).vectors)
         end
     end
+
+    if VERSION >= v"1.9"
+        @testset "#139" begin
+            A = Hermitian(Diagonal([1.0, 2.0]))
+            @test eigvals(A) == diag(A)
+            @test eigen(A).values == diag(A)
+        end
+    end
 end