MPI_Comm_get_info(comm, &info_out);
MPI_Info_get(info_out, invalid_key, MPI_MAX_INFO_VAL, buf, &flag);
-#ifndef USE_STRICT_MPI
+#ifdef USE_STRICT_MPI
/* Check if our invalid key was ignored. Note, this check's MPICH's
* behavior, but this behavior may not be required for a standard
* conforming MPI implementation. */