struct ture {
        int a;
};

struct ture *a;
struct ture *b;

void func (void)
{
        if (!a && !(a = returns_nonnull()))
                return;
        a->a = 1;

        if (b || (b = returns_nonnull())) {
                b->a  = 1;
                return;
        }
        b->a = 1;
}
/*
 * check-name: Compound Conditions
 * check-command: smatch sm_compound_condition.c
 *
 * check-output-start
sm_compound_condition.c:18 func() error: we previously assumed 'b' could be null (see line 14)
 * check-output-end
 */