qemu/scripts/coccinelle/error_propagate_null.cocci
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   1// error_propagate() already ignores local_err==NULL, so there's
   2// no need to check it before calling.
   3
   4@@
   5identifier L;
   6expression E;
   7@@
   8-if (L) {
   9     error_propagate(E, L);
  10-}
  11