// Copyright: (C) 2009 Gilles Muller, Julia Lawall, INRIA, DIKU. GPLv2. @match_bad_null_test@ expression x, E; statement S1,S2; @@ x = open_xa_dir(...) ... when != x = E ( * if (x == NULL && ...) S1 else S2 | * if (x == NULL || ...) S1 else S2 )