tests/ui/cast/casts-differing-anon.rs

   1 use std::fmt;
   2
   3 fn foo() -> Box<impl fmt::Debug+?Sized> {
   4     let x : Box<[u8]> = Box::new([0]);
   5     x
   6 }
   7 fn bar() -> Box<impl fmt::Debug+?Sized> {
   8     let y: Box<dyn fmt::Debug> = Box::new([0]);
   9     y
  10 }
  11
  12 fn main() {
  13     let f = foo();
  14     let b = bar();
  15
  16     // this is an `*mut [u8]` in practice
  17     let f_raw : *mut _ = Box::into_raw(f);
  18     // this is an `*mut fmt::Debug` in practice
  19     let mut b_raw = Box::into_raw(b);
  20     // ... and they should not be mixable
  21     b_raw = f_raw as *mut _; //~ ERROR is invalid
  22 }