An array or slice pattern was matched against some other type.
Example of erroneous code:
```compile_fail,E0529
let r: f32 = 1.0;
match r {
[a, b] => { // error: expected an array or slice, found `f32`
println!("a={}, b={}", a, b);
}
}
```
Ensure that the pattern and the expression being matched on are of consistent
types:
```
let r = [1.0, 2.0];
match r {
[a, b] => { // ok!
println!("a={}, b={}", a, b);
}
}
```