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-rw-r--r--src/libsyntax/ext/expand.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index f5794f7219b..5bfdab791d6 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -1061,6 +1061,7 @@ fn expand_impl_item(ii: ast::ImplItem, fld: &mut MacroExpander)
             ident: ii.ident,
             attrs: ii.attrs,
             vis: ii.vis,
+            defaultness: ii.defaultness,
             node: match ii.node  {
                 ast::ImplItemKind::Method(sig, body) => {
                     let (sig, body) = expand_and_rename_method(sig, body, fld);