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-rw-r--r--src/libsyntax/ext/build.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index 2e5fe63eb5a..adb0b26e646 100644
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -20,11 +20,13 @@ fn mk_uint(cx: ext_ctxt, sp: span, u: uint) -> @ast::expr {
 fn mk_binary(cx: ext_ctxt, sp: span, op: ast::binop,
              lhs: @ast::expr, rhs: @ast::expr)
    -> @ast::expr {
+    cx.next_id(); // see ast_util::op_expr_callee_id
     let binexpr = ast::expr_binary(op, lhs, rhs);
     ret @{id: cx.next_id(), node: binexpr, span: sp};
 }
 fn mk_unary(cx: ext_ctxt, sp: span, op: ast::unop, e: @ast::expr)
     -> @ast::expr {
+    cx.next_id(); // see ast_util::op_expr_callee_id
     let expr = ast::expr_unary(op, e);
     ret @{id: cx.next_id(), node: expr, span: sp};
 }