http://dstress.kuehne.cn/benchmark/known_gcc_problems/gcc_7344.d

- -----------------------------------------------------
int f(){
        printf("F\n");
        return 0;
}

int main(char[][] args) {
        if(args.length<1){
                c: return 0;
        }
        switch (args.length) { // **line 20**
                case 1: f(); goto c;
                case 2: f(); goto c;
                case 3: f(); goto c;
[...]
                case 9999: f(); goto c;
                case 10000: f(); goto c;
        }
}
- -----------------------------------------------------

>dmd -w gcc_7344.d
warning - gcc_7344.d(20): switch statement has no default
warning - gcc_7344.d(20): statement is not reachable
warning - gcc_7344.d(16): function dstress.benchmark.gcc_7344.main no
return at end of function

Adding a default case removes the "not reacheable" warning.

Thomas