rust/tests/ui/issues/issue-18919.stderr
Esteban Küber c4c22b0d52 On E0277 be clearer about implicit Sized bounds on type params and assoc types
```
error[E0277]: the size for values of type `[i32]` cannot be known at compilation time
   --> f100.rs:2:33
    |
2   |     let _ = std::mem::size_of::<[i32]>();
    |                                 ^^^^^ doesn't have a size known at compile-time
    |
    = help: the trait `Sized` is not implemented for `[i32]`
note: required by an implicit `Sized` bound in `std::mem::size_of`
   --> /home/gh-estebank/rust/library/core/src/mem/mod.rs:312:22
    |
312 | pub const fn size_of<T>() -> usize {
    |                      ^ required by the implicit `Sized` requirement on this bound in `size_of`
```

Fix #120178.
2024-02-01 03:30:26 +00:00

24 lines
984 B
Plaintext

error[E0277]: the size for values of type `dyn for<'a> Fn(&'a isize) -> isize` cannot be known at compilation time
--> $DIR/issue-18919.rs:3:15
|
LL | fn ho_func(f: Option<FuncType>) {
| ^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `dyn for<'a> Fn(&'a isize) -> isize`
note: required by an implicit `Sized` bound in `Option`
--> $DIR/issue-18919.rs:7:13
|
LL | enum Option<T> {
| ^ required by the implicit `Sized` requirement on this bound in `Option`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
--> $DIR/issue-18919.rs:7:13
|
LL | enum Option<T> {
| ^ this could be changed to `T: ?Sized`...
LL | Some(T),
| - ...if indirection were used here: `Box<T>`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.