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-rw-r--r--src/libsyntax_ext/deriving/generic/mod.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax_ext/deriving/generic/mod.rs b/src/libsyntax_ext/deriving/generic/mod.rs
index 7e6d9126c87..b21a6e7bc78 100644
--- a/src/libsyntax_ext/deriving/generic/mod.rs
+++ b/src/libsyntax_ext/deriving/generic/mod.rs
@@ -1613,6 +1613,7 @@ impl<'a> TraitDef<'a> {
                         source_map::Spanned {
                             span: pat.span.with_ctxt(self.span.ctxt()),
                             node: ast::FieldPat {
+                                id: ast::DUMMY_NODE_ID,
                                 ident: ident.unwrap(),
                                 pat,
                                 is_shorthand: false,