Include variant aliases in error messages

Author: Mingun

serde_derive/src/de.rs

@@ -1259,7 +1259,7 @@ fn prepare_enum_variant_enum(variants: &[Variant]) -> (TokenStream, Stmts) {
         });
 
     let variants_stmt = {
-        let variant_names = variant_names_idents.iter().map(|(name, _, _)| name);
+        let variant_names = variant_names_idents.iter().flat_map(|&(_, _, aliases)| aliases);
         quote! {
             #[doc(hidden)]
             const VARIANTS: &'static [&'static str] = &[ #(#variant_names),* ];

test_suite/tests/test_annotations.rs

@@ -782,7 +782,7 @@ fn test_unknown_field_rename_enum() {
             variant: "SailorMoon",
             len: 3,
         }],
-        "unknown variant `SailorMoon`, expected `sailor_moon`",
+        "unknown variant `SailorMoon`, expected `sailor_moon` or `usagi_tsukino`",
     );
 
     assert_de_tokens_error::<AliasEnum>(