compiles

src/canvas/shader/dynamic_vertex.rs

@@ -131,6 +131,11 @@ unsafe impl<I> VertexDefinition<I> for RuntimeVertexDef
                                AttributeInfo { offset: 0, format: binding.format }));
         }
 
+//        let buffers = vec![
+//            (0, mem::size_of::<T>(), InputRate::Vertex),
+//            (1, mem::size_of::<U>(), InputRate::Instance),
+//        ].into_iter();
+
         Ok((buffers_iter, attribs_iter.into_iter()))
     }
 }