Solved #1105.

When a field should be skipped during deserialization, it will not use its own Default implementation
when the container structure has `#[serde(default)]` set.

serde_derive/src/de.rs

@@ -447,7 +447,30 @@ fn deserialize_seq(
         };
     }
 
+    let let_default = match *cattrs.default() {
+        attr::Default::Default => {
+            Some(
+                quote!(
+                let __default: Self::Value = _serde::export::Default::default();
+            ),
+            )
+        }
+        attr::Default::Path(ref path) => {
+            Some(
+                quote!(
+                let __default: Self::Value = #path();
+            ),
+            )
+        }
+        attr::Default::None => {
+            // We don't need the default value, to prevent an unused variable warning
+            // we'll leave the line empty.
+            None
+        }
+    };
+
     quote_block! {
+        #let_default
         #(#let_values)*
         _serde::export::Ok(#result)
     }