Merge branch 'master' into feat/diagFlatOp

operations.go

@@ -632,13 +632,8 @@ func Reshape(n *Node, to tensor.Shape) (retVal *Node, err error) {
 }
 
 // Ravel flattens the given node and returns the new node
-func Ravel(n *Node) (retVal *Node) {
-	retVal, err := Reshape(n, tensor.Shape{n.shape.TotalSize()})
-	if err != nil {
-		panic(err)
-	}
-
-	return retVal
+func Ravel(n *Node) (retVal *Node, err error) {
+	return Reshape(n, tensor.Shape{n.shape.TotalSize()})
 }
 
 /* Contraction related operations */

operations_test.go

@@ -1051,8 +1051,9 @@ func TestRavel(t *testing.T) {
 	for i, rst := range ravelTests {
 		g := NewGraph()
 		t := NewTensor(g, Float64, len(rst.input), WithShape(rst.input...))
-		t2 := Ravel(t)
+		t2, err := Ravel(t)
 
+		c.NoError(err)
 		c.Equal(rst.output, t2.Shape(), "expected to be flatten in test case: %d", i)
 	}
 }