error[E0277]: the size for values of type `str` cannot be known at compilation time --> $DIR/dont-ctfe-unsized-initializer.rs:1:11 | LL | static S: str = todo!(); | ^^^ doesn't have a size known at compile-time | = help: the trait `Sized` is not implemented for `str` = note: statics and constants must have a statically known size error[E0277]: the size for values of type `str` cannot be known at compilation time --> $DIR/dont-ctfe-unsized-initializer.rs:4:10 | LL | const C: str = todo!(); | ^^^ doesn't have a size known at compile-time | = help: the trait `Sized` is not implemented for `str` = note: statics and constants must have a statically known size error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.