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// Attempt to change the mutability as well as unsizing.
struct Fat<T: ?Sized> {
ptr: T
}
struct Foo;
trait Bar {}
impl Bar for Foo {}
pub fn main() {
// With a vec of ints.
let f1 = Fat { ptr: [1, 2, 3] };
let f2: &Fat<[isize; 3]> = &f1;
let f3: &mut Fat<[isize]> = f2; //~ ERROR mismatched types
// With a trait.
let f1 = Fat { ptr: Foo };
let f2: &Fat<Foo> = &f1;
let f3: &mut Fat<dyn Bar> = f2; //~ ERROR mismatched types
// Tuple with a vec of ints.
let f1 = ([1, 2, 3],);
let f2: &([isize; 3],) = &f1;
let f3: &mut ([isize],) = f2; //~ ERROR mismatched types
// Tuple with a trait.
let f1 = (Foo,);
let f2: &(Foo,) = &f1;
let f3: &mut (dyn Bar,) = f2; //~ ERROR mismatched types
}
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