diff options
| -rw-r--r-- | src/libsyntax_ext/deriving/custom.rs | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/libsyntax_ext/deriving/custom.rs b/src/libsyntax_ext/deriving/custom.rs index 1f9c24a0dcd..716cf3a94b5 100644 --- a/src/libsyntax_ext/deriving/custom.rs +++ b/src/libsyntax_ext/deriving/custom.rs @@ -53,6 +53,7 @@ impl MultiItemModifier for CustomDerive { } } + let input_span = item.span; let input = __internal::new_token_stream(item); let res = __internal::set_parse_sess(&ecx.parse_sess, || { let inner = self.inner; @@ -77,9 +78,9 @@ impl MultiItemModifier for CustomDerive { // Right now we have no knowledge of spans at all in custom derive // macros, everything is just parsed as a string. Reassign all spans to - // the #[derive] attribute for better errors here. + // the input `item` for better errors here. item.into_iter().flat_map(|item| { - ChangeSpan { span: span }.fold_item(item) + ChangeSpan { span: input_span }.fold_item(item) }).map(Annotatable::Item).collect() } } |