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Opportunistically resolve regions when processing region outlives obligations

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This commit is contained in:
Michael Goulet 2024-02-27 23:30:07 +00:00
parent ef324565d0
commit 5cdbe83af8
3 changed files with 14 additions and 18 deletions
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2
tests/ui/implied-bounds/impl-implied-bounds-compatibility.rs
View file

@ -10,7 +10,7 @@ pub trait MessageListenersInterface {
impl<'a> MessageListenersInterface for MessageListeners<'a> {
fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
//~^ ERROR cannot infer an appropriate lifetime for lifetime parameter 'b in generic type due to conflicting requirements
//~^ ERROR in type `&'a MessageListeners<'_>`, reference has a longer lifetime than the data it references
self
}
}

20
tests/ui/implied-bounds/impl-implied-bounds-compatibility.stderr
View file

@ -1,27 +1,15 @@
error[E0495]: cannot infer an appropriate lifetime for lifetime parameter 'b in generic type due to conflicting requirements
error[E0491]: in type `&'a MessageListeners<'_>`, reference has a longer lifetime than the data it references
--> $DIR/impl-implied-bounds-compatibility.rs:12:5
|
LL | fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: first, the lifetime cannot outlive the lifetime `'c` as defined here...
--> $DIR/impl-implied-bounds-compatibility.rs:12:5
|
LL | fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...so that the method type is compatible with trait
--> $DIR/impl-implied-bounds-compatibility.rs:12:5
|
LL | fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: expected `fn(&'c MessageListeners<'_>) -> &'c MessageListeners<'c>`
found `fn(&MessageListeners<'_>) -> &'a MessageListeners<'_>`
note: but, the lifetime must be valid for the lifetime `'a` as defined here...
note: the pointer is valid for the lifetime `'a` as defined here
--> $DIR/impl-implied-bounds-compatibility.rs:11:6
|
LL | impl<'a> MessageListenersInterface for MessageListeners<'a> {
| ^^
note: ...so that the reference type `&'a MessageListeners<'_>` does not outlive the data it points at
note: but the referenced data is only valid for the lifetime `'c` as defined here
--> $DIR/impl-implied-bounds-compatibility.rs:12:5
|
LL | fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
@ -29,4 +17,4 @@ LL | fn listeners<'b>(&'b self) -> &'a MessageListeners<'b> {
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0495`.
For more information about this error, try `rustc --explain E0491`.