Fixes

src/arithmetic.jl

@@ -132,7 +132,7 @@ end
 # TODO just push to internal vectors once canonical is implemented for SparseVector
 function unsafe_push!(a::SparseArrays.SparseVector, k, v)
     a[k] = MA.add!!(a[k], v)
-    return v
+    return a
 end
 
 function unsafe_push!(a::AlgebraElement, k, v)