struct foo {
        int a;
};

struct foo *a;
struct foo *b;
struct foo *c;
struct foo *d;
int x;

void func (void)
{
        a = 0;
        b = 0;
        c = 0;
        d = 0;

        if (x == 1)
                a = some_func();
        else if (x == 2)
                b = some_func();
        else if (x == 3)
                c = some_func();
        else
                d = some_func();

        switch(x) {
        case 1:
                a->a = 1;
        case 2:
                a->a = 2;
                b->a = 3;
                break;
        case 3:
                c->a = 4;
                break;
        case 4:
                d->a = 5;
                break;
        }
}
/*
 * check-name: Smatch switch handling #2
 * check-command: smatch --spammy sm_switch2.c
 *
 * check-output-start
sm_switch2.c:31 func() warn: missing break? reassigning 'a->a'
sm_switch2.c:31 func() error: potential NULL dereference 'a'.
sm_switch2.c:32 func() error: potential NULL dereference 'b'.
 * check-output-end
 */