compile error for one line repeated 11 times

[makoConstruct]

fn main() {
    for i in range(0, 30) {
    }
}

says

2:11: 2:16 error: cannot determine a type for this bounded type parameter: cannot determine the type of this integer; add a suffix to specify the type explicitly
2   for i in range(0, 30) {
             ^~~~~

11 times.

[thestinger]

It's not caused by loop unrolling, optimizations aren't done in the frontend. The same errors occur with for i in range(0, 1).

[makoConstruct]

Yes, the error on that line is expected, perhaps I could be clearer, I'm reporting the fact that it was repeated 11 times.

[reem]

Dup of #16966

rustc sometimes duplicates error reporting.