explicit_counter_loop produces incorrect advice

[ChrisJefferson]

Using clippy 0.0.212 (3aea860 2019-09-03), consider the following function (which was reduced from a larger function

pub fn loopy(x : Vec<isize>) {
    let mut l = 0;
    for i in x {
        println!("1:{}:{}\n",i,l);
        l += 1;
        println!("1:{}:{}\n",i,l);
    }
}

Clippy suggests:

warning: the variable `l` is used as a loop counter.
   --> src/game.rs:350:14
    |
350 |     for i in x {
    |              ^ help: consider using: `for (l, i) in x.enumerate()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop

However, it isn't that simple, as l is used both before, and after incrementing. This might be OK, because just doing the suggested fix isn't enough anyway, so someone should hopefully notice what's going on. The other option would be to only suggest this if there is no further usage of the loop variable after it is incremented.