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rust/tests/ui/consts/promoted-const-drop.stderr

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bless tests part 1
2024-06-25 03:36:40 -05:00
error: const `impl` for trait `Drop` which is not marked with `#[const_trait]`
stabilize const_mut_refs
2024-08-17 07:19:34 -05:00
--> $DIR/promoted-const-drop.rs:5:12
bless tests part 1
2024-06-25 03:36:40 -05:00
|
LL | impl const Drop for A {
| ^^^^
|
= note: marking a trait with `#[const_trait]` ensures all default method bodies are `const`
= note: adding a non-const method body in the future would be a breaking change
Do not promote values with const drop that need to be dropped Changes from #88558 allowed using `~const Drop` in constants by introducing a new `NeedsNonConstDrop` qualif. The new qualif was also used for promotion purposes, and allowed promotion to happen for values that needs to be dropped but which do have a const drop impl. Since for promoted the drop implementation is never executed, this lead to observable change in behaviour. For example: ```rust struct Panic(); impl const Drop for Panic { fn drop(&mut self) { panic!(); } } fn main() { let _ = &Panic(); } ``` Restore the use of `NeedsDrop` qualif during promotion to avoid the issue.
2021-10-16 19:00:00 -05:00
error[E0716]: temporary value dropped while borrowed
stabilize const_mut_refs
2024-08-17 07:19:34 -05:00
--> $DIR/promoted-const-drop.rs:13:26
Do not promote values with const drop that need to be dropped Changes from #88558 allowed using `~const Drop` in constants by introducing a new `NeedsNonConstDrop` qualif. The new qualif was also used for promotion purposes, and allowed promotion to happen for values that needs to be dropped but which do have a const drop impl. Since for promoted the drop implementation is never executed, this lead to observable change in behaviour. For example: ```rust struct Panic(); impl const Drop for Panic { fn drop(&mut self) { panic!(); } } fn main() { let _ = &Panic(); } ``` Restore the use of `NeedsDrop` qualif during promotion to avoid the issue.
2021-10-16 19:00:00 -05:00
|
LL | let _: &'static A = &A();
Update tests to match error message changes
2022-10-20 10:43:27 -05:00
| ---------- ^^^ creates a temporary value which is freed while still in use
Do not promote values with const drop that need to be dropped Changes from #88558 allowed using `~const Drop` in constants by introducing a new `NeedsNonConstDrop` qualif. The new qualif was also used for promotion purposes, and allowed promotion to happen for values that needs to be dropped but which do have a const drop impl. Since for promoted the drop implementation is never executed, this lead to observable change in behaviour. For example: ```rust struct Panic(); impl const Drop for Panic { fn drop(&mut self) { panic!(); } } fn main() { let _ = &Panic(); } ``` Restore the use of `NeedsDrop` qualif during promotion to avoid the issue.
2021-10-16 19:00:00 -05:00
| |
| type annotation requires that borrow lasts for `'static`
LL | let _: &'static [A] = &[C];
LL | }
| - temporary value is freed at the end of this statement
error[E0716]: temporary value dropped while borrowed
stabilize const_mut_refs
2024-08-17 07:19:34 -05:00
--> $DIR/promoted-const-drop.rs:14:28
Do not promote values with const drop that need to be dropped Changes from #88558 allowed using `~const Drop` in constants by introducing a new `NeedsNonConstDrop` qualif. The new qualif was also used for promotion purposes, and allowed promotion to happen for values that needs to be dropped but which do have a const drop impl. Since for promoted the drop implementation is never executed, this lead to observable change in behaviour. For example: ```rust struct Panic(); impl const Drop for Panic { fn drop(&mut self) { panic!(); } } fn main() { let _ = &Panic(); } ``` Restore the use of `NeedsDrop` qualif during promotion to avoid the issue.
2021-10-16 19:00:00 -05:00
|
LL | let _: &'static [A] = &[C];
Update tests to match error message changes
2022-10-20 10:43:27 -05:00
| ------------ ^^^ creates a temporary value which is freed while still in use
Do not promote values with const drop that need to be dropped Changes from #88558 allowed using `~const Drop` in constants by introducing a new `NeedsNonConstDrop` qualif. The new qualif was also used for promotion purposes, and allowed promotion to happen for values that needs to be dropped but which do have a const drop impl. Since for promoted the drop implementation is never executed, this lead to observable change in behaviour. For example: ```rust struct Panic(); impl const Drop for Panic { fn drop(&mut self) { panic!(); } } fn main() { let _ = &Panic(); } ``` Restore the use of `NeedsDrop` qualif during promotion to avoid the issue.
2021-10-16 19:00:00 -05:00
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
bless tests part 1
2024-06-25 03:36:40 -05:00
error: aborting due to 3 previous errors
Do not promote values with const drop that need to be dropped Changes from #88558 allowed using `~const Drop` in constants by introducing a new `NeedsNonConstDrop` qualif. The new qualif was also used for promotion purposes, and allowed promotion to happen for values that needs to be dropped but which do have a const drop impl. Since for promoted the drop implementation is never executed, this lead to observable change in behaviour. For example: ```rust struct Panic(); impl const Drop for Panic { fn drop(&mut self) { panic!(); } } fn main() { let _ = &Panic(); } ``` Restore the use of `NeedsDrop` qualif during promotion to avoid the issue.
2021-10-16 19:00:00 -05:00
For more information about this error, try `rustc --explain E0716`.
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