error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/opaque_not_sized.rs:4:14
|
4 | type TypeR;
| -----^^^^^-
| | |
| | doesn't have a size known at compile-time
| required by this bound in `__AssertSized`
|
= help: within `TypeR`, the trait `Sized` is not implemented for `str`
= note: required because it appears within the type `TypeR`