// Copyright 2016 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. trait Bar { type Bar; } struct ArrayPeano { data: T::Bar, } fn foo(a: &ArrayPeano) -> &[T] where T: Bar { unsafe { std::mem::transmute(a) } //~ ERROR transmute called with types of different sizes } impl Bar for () { type Bar = (); } fn main() { let x: ArrayPeano<()> = ArrayPeano { data: () }; foo(&x); }