src/test/ui/object-safety/issue-19538.stderr

   1 error[E0038]: the trait `Bar` cannot be made into an object
   2   --> $DIR/issue-19538.rs:17:15
   3    |
   4 LL |     let test: &mut dyn Bar = &mut thing;
   5    |               ^^^^^^^^^^^^ `Bar` cannot be made into an object
   6    |
   7 note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
   8   --> $DIR/issue-19538.rs:2:8
   9    |
  10 LL |     fn foo<T>(&self, val: T);
  11    |        ^^^ ...because method `foo` has generic type parameters
  12 ...
  13 LL | trait Bar: Foo { }
  14    |       --- this trait cannot be made into an object...
  15    = help: consider moving `foo` to another trait
  16
  17 error[E0038]: the trait `Bar` cannot be made into an object
  18   --> $DIR/issue-19538.rs:17:30
  19    |
  20 LL |     let test: &mut dyn Bar = &mut thing;
  21    |                              ^^^^^^^^^^ `Bar` cannot be made into an object
  22    |
  23 note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
  24   --> $DIR/issue-19538.rs:2:8
  25    |
  26 LL |     fn foo<T>(&self, val: T);
  27    |        ^^^ ...because method `foo` has generic type parameters
  28 ...
  29 LL | trait Bar: Foo { }
  30    |       --- this trait cannot be made into an object...
  31    = help: consider moving `foo` to another trait
  32    = note: required for `&mut Thing` to implement `CoerceUnsized<&mut dyn Bar>`
  33    = note: required by cast to type `&mut dyn Bar`
  34
  35 error: aborting due to 2 previous errors
  36
  37 For more information about this error, try `rustc --explain E0038`.