src/test/ui/packed/issue-27060-2.stderr

   1 error[E0277]: the size for values of type `T` cannot be known at compilation time
   2   --> $DIR/issue-27060-2.rs:3:11
   3    |
   4 LL | pub struct Bad<T: ?Sized> {
   5    |                - this type parameter needs to be `std::marker::Sized`
   6 LL |     data: T,
   7    |           ^ doesn't have a size known at compile-time
   8    |
   9    = note: the last field of a packed struct may only have a dynamically sized type if it does not need drop to be run
  10    = help: change the field's type to have a statically known size
  11 help: consider removing the `?Sized` bound to make the type parameter `Sized`
  12    |
  13 LL - pub struct Bad<T: ?Sized> {
  14 LL + pub struct Bad<T> {
  15    |
  16 help: borrowed types always have a statically known size
  17    |
  18 LL |     data: &T,
  19    |           +
  20 help: the `Box` type always has a statically known size and allocates its contents in the heap
  21    |
  22 LL |     data: Box<T>,
  23    |           ++++ +
  24
  25 error: aborting due to previous error
  26
  27 For more information about this error, try `rustc --explain E0277`.