Bugzilla

Now I'm curious, is it correct (not UB) to uses values in `buffer` from a previous iteration? If so, using `-ftrivial-auto-var-init=` is actually breaking programs that do so.

Now I'm curious, is it correct (not UB) to use values in `buffer` from a previous iteration? If so, using `-ftrivial-auto-var-init=` is actually breaking programs that do so.

What is the expected output of this program?

```c
#include <stdio.h>

int main() {
    int max = 0;
    for(int i = 0; i < 10; i++) {
        int buffer[10];
        if(i == 0) {
            buffer[0] = 0;
        }
        else {
            buffer[i] = buffer[i-1] + 1;
        }
        if (buffer[i] > max) {
            max = buffer[i];
        }
    }
    printf("%d\n", max);
    return 0;
}
```

https://godbolt.org/z/rfGdbPzos
https://godbolt.org/z/3h4ncTx69 (with -ftrivial-auto-var-init=zero)