cgen: fix struct embedding method when receiver is ptr (#7710)

vlib/v/gen/fn.v

@@ -436,7 +436,7 @@ fn (mut g Gen) method_call(node ast.CallExpr) {
 	} else {
 		g.write('${name}(')
 	}
-	if node.receiver_type.is_ptr() && !node.left_type.is_ptr() {
+	if node.receiver_type.is_ptr() && (!node.left_type.is_ptr() || node.from_embed_type != 0) {
 		// The receiver is a reference, but the caller provided a value
 		// Add `&` automatically.
 		// TODO same logic in call_args()
@@ -455,7 +455,12 @@ fn (mut g Gen) method_call(node ast.CallExpr) {
 		g.expr(node.left)
 		if node.from_embed_type != 0 {
 			embed_name := typ_sym.embed_name()
-			g.write('.$embed_name')
+			if node.left_type.is_ptr() {
+				g.write('->')
+			} else {
+				g.write('.')
+			}
+			g.write(embed_name)
 		}
 	}
 	if has_cast {

vlib/v/tests/struct_embed_test.v

@@ -79,3 +79,18 @@ fn test_assign() {
 	h.x = 5
 	assert h.x == 5
 }
+
+struct Eggs {}
+
+fn (f &Eggs) test(x int) int {
+	return x
+}
+
+struct Breakfast {
+	Eggs
+}
+
+fn test_embed_method_receiver_ptr() {
+	b := Breakfast{}
+	assert b.test(5) == 5
+}