if (make_new_sources (region, nsrcs, suffix))
return -1;
// FIXME: how to make a whole file region if it isn't?
//assert(region->whole_file());
if (make_new_sources (region, nsrcs, suffix))
return -1;
// FIXME: how to make a whole file region if it isn't?
//assert(region->whole_file());