/* PR middle-end/18859 */
/* { dg-do compile } */
/* { dg-options "" } */
void foo(int a)
{
switch (a)
case 0 ... -1: /* { dg-warning "empty range" } */
a = a+2;
break;
case 1 ... 2:
a = 0;
case 3 ... 4:
a = 1;
case 5 ... 6:
}