Make it more clear when complaining about async fn's return types
This commit is contained in:
Gus Wynn
parent
ffeeb20398
commit
20e032e650
12 changed files with 333 additions and 135 deletions
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@ -2,12 +2,14 @@ error[E0623]: lifetime mismatch
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--> $DIR/issue-63388-1.rs:14:9
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LL | &'a self, foo: &dyn Foo
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| -------- this parameter and the return type are declared with different lifetimes...
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| -------- this parameter and the returned future are declared with different lifetimes...
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LL | ) -> &dyn Foo
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| --------
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| |
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| this `async fn` implicitly returns an `impl Future<Output = &dyn Foo>`
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LL | {
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LL | foo
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| ^^^ ...but data from `foo` is returned here
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| ^^^ ...but data from `foo` is held across an await point here
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error: aborting due to previous error
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@ -4,8 +4,9 @@ error[E0623]: lifetime mismatch
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LL | async fn async_ret_impl_trait1<'a, 'b>(a: &'a u8, b: &'b u8) -> impl Trait<'a> {
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| ------ ^^^^^^^^^^^^^^
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| | |
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| | ...but data from `b` is returned here
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| this parameter and the return type are declared with different lifetimes...
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| | ...but data from `b` is held across an await point here
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| | this `async fn` implicitly returns an `impl Future<Output = impl Trait<'a>>`
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| this parameter and the returned future are declared with different lifetimes...
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error: aborting due to previous error
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38
src/test/ui/issues/issue-76547.rs
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38
src/test/ui/issues/issue-76547.rs
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@ -0,0 +1,38 @@
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// Test for for diagnostic improvement issue #76547
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// edition:2018
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use std::{
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future::Future,
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task::{Context, Poll}
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};
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use std::pin::Pin;
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pub struct ListFut<'a>(&'a mut [&'a mut [u8]]);
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impl<'a> Future for ListFut<'a> {
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type Output = ();
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fn poll(self: Pin<&mut Self>, _cx: &mut Context) -> Poll<Self::Output> {
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unimplemented!()
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}
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}
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async fn fut(bufs: &mut [&mut [u8]]) {
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ListFut(bufs).await
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//~^ ERROR lifetime mismatch
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}
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pub struct ListFut2<'a>(&'a mut [&'a mut [u8]]);
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impl<'a> Future for ListFut2<'a> {
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type Output = i32;
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fn poll(self: Pin<&mut Self>, _cx: &mut Context) -> Poll<Self::Output> {
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unimplemented!()
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}
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}
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async fn fut2(bufs: &mut [&mut [u8]]) -> i32 {
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ListFut2(bufs).await
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//~^ ERROR lifetime mismatch
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}
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fn main() {}
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25
src/test/ui/issues/issue-76547.stderr
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25
src/test/ui/issues/issue-76547.stderr
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@ -0,0 +1,25 @@
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error[E0623]: lifetime mismatch
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--> $DIR/issue-76547.rs:20:13
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LL | async fn fut(bufs: &mut [&mut [u8]]) {
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| --------- -
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = ()>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | ListFut(bufs).await
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| ^^^^ ...but data from `bufs` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/issue-76547.rs:34:14
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LL | async fn fut2(bufs: &mut [&mut [u8]]) -> i32 {
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| --------- ---
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = i32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | ListFut2(bufs).await
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| ^^^^ ...but data from `bufs` is held across an await point here
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0623`.
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@ -2,25 +2,28 @@ error[E0623]: lifetime mismatch
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--> $DIR/arbitrary_self_types_pin_lifetime_mismatch-async.rs:8:52
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LL | async fn a(self: Pin<&Foo>, f: &Foo) -> &Foo { f }
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| ---- ---- ^ ...but data from `f` is returned here
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| |
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| this parameter and the return type are declared with different lifetimes...
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| ---- ---- ^ ...but data from `f` is held across an await point here
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &Foo>`
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| this parameter and the returned future are declared with different lifetimes...
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error[E0623]: lifetime mismatch
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--> $DIR/arbitrary_self_types_pin_lifetime_mismatch-async.rs:11:82
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LL | async fn c(self: Pin<&Self>, f: &Foo, g: &Foo) -> (Pin<&Foo>, &Foo) { (self, f) }
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| ----- ----------------- ^ ...but data from `f` is returned here
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| |
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| this parameter and the return type are declared with different lifetimes...
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| ----- ----------------- ^ ...but data from `f` is held across an await point here
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = (Pin<&Foo>, &Foo)>`
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| this parameter and the returned future are declared with different lifetimes...
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error[E0623]: lifetime mismatch
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--> $DIR/arbitrary_self_types_pin_lifetime_mismatch-async.rs:17:64
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LL | async fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> &() { arg }
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| ----- --- ^^^ ...but data from `arg` is returned here
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| |
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| this parameter and the return type are declared with different lifetimes...
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| ----- --- ^^^ ...but data from `arg` is held across an await point here
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &()>`
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| this parameter and the returned future are declared with different lifetimes...
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error: aborting due to 3 previous errors
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@ -3,60 +3,66 @@ error[E0623]: lifetime mismatch
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LL | async fn ref_self(&self, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/lt-ref-self-async.rs:19:9
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LL | async fn ref_Self(self: &Self, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/lt-ref-self-async.rs:23:9
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LL | async fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/lt-ref-self-async.rs:27:9
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LL | async fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/lt-ref-self-async.rs:31:9
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LL | async fn box_box_ref_Self(self: Box<Box<&Self>>, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/lt-ref-self-async.rs:35:9
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LL | async fn box_pin_Self(self: Box<Pin<&Self>>, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error: aborting due to 6 previous errors
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@ -3,60 +3,66 @@ error[E0623]: lifetime mismatch
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LL | async fn ref_self(&mut self, f: &u32) -> &u32 {
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| --------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-self-async.rs:19:9
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LL | async fn ref_Self(self: &mut Self, f: &u32) -> &u32 {
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| --------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-self-async.rs:23:9
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LL | async fn box_ref_Self(self: Box<&mut Self>, f: &u32) -> &u32 {
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| --------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-self-async.rs:27:9
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LL | async fn pin_ref_Self(self: Pin<&mut Self>, f: &u32) -> &u32 {
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| --------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-self-async.rs:31:9
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LL | async fn box_box_ref_Self(self: Box<Box<&mut Self>>, f: &u32) -> &u32 {
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| --------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-self-async.rs:35:9
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LL | async fn box_pin_ref_Self(self: Box<Pin<&mut Self>>, f: &u32) -> &u32 {
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| --------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error: aborting due to 6 previous errors
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@ -3,50 +3,55 @@ error[E0623]: lifetime mismatch
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LL | async fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 {
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| ----------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-struct-async.rs:17:9
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LL | async fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 {
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| ----------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-struct-async.rs:21:9
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LL | async fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 {
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| ----------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-struct-async.rs:25:9
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LL | async fn box_box_ref_Struct(self: Box<Box<&mut Struct>>, f: &u32) -> &u32 {
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| ----------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-mut-struct-async.rs:29:9
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LL | async fn box_pin_ref_Struct(self: Box<Pin<&mut Struct>>, f: &u32) -> &u32 {
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| ----------- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error: aborting due to 5 previous errors
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@ -3,70 +3,77 @@ error[E0623]: lifetime mismatch
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LL | async fn ref_self(&self, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-self-async.rs:29:9
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LL | async fn ref_Self(self: &Self, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-self-async.rs:33:9
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LL | async fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 {
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| ----- ----
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| |
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| this parameter and the return type are declared with different lifetimes...
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| | |
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| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
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| this parameter and the returned future are declared with different lifetimes...
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LL | f
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| ^ ...but data from `f` is returned here
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| ^ ...but data from `f` is held across an await point here
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error[E0623]: lifetime mismatch
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--> $DIR/ref-self-async.rs:37:9
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LL | async fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 {
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| ----- ----
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| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-self-async.rs:41:9
|
||||
|
|
||||
LL | async fn box_box_ref_Self(self: Box<Box<&Self>>, f: &u32) -> &u32 {
|
||||
| ----- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-self-async.rs:45:9
|
||||
|
|
||||
LL | async fn box_pin_ref_Self(self: Box<Pin<&Self>>, f: &u32) -> &u32 {
|
||||
| ----- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-self-async.rs:49:9
|
||||
|
|
||||
LL | async fn wrap_ref_Self_Self(self: Wrap<&Self, Self>, f: &u8) -> &u8 {
|
||||
| ----- ---
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u8>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error: aborting due to 7 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -3,50 +3,55 @@ error[E0623]: lifetime mismatch
|
|||
|
|
||||
LL | async fn ref_Struct(self: &Struct, f: &u32) -> &u32 {
|
||||
| ------- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-struct-async.rs:17:9
|
||||
|
|
||||
LL | async fn box_ref_Struct(self: Box<&Struct>, f: &u32) -> &u32 {
|
||||
| ------- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-struct-async.rs:21:9
|
||||
|
|
||||
LL | async fn pin_ref_Struct(self: Pin<&Struct>, f: &u32) -> &u32 {
|
||||
| ------- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-struct-async.rs:25:9
|
||||
|
|
||||
LL | async fn box_box_ref_Struct(self: Box<Box<&Struct>>, f: &u32) -> &u32 {
|
||||
| ------- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error[E0623]: lifetime mismatch
|
||||
--> $DIR/ref-struct-async.rs:29:9
|
||||
|
|
||||
LL | async fn box_pin_Struct(self: Box<Pin<&Struct>>, f: &u32) -> &u32 {
|
||||
| ------- ----
|
||||
| |
|
||||
| this parameter and the return type are declared with different lifetimes...
|
||||
| | |
|
||||
| | this `async fn` implicitly returns an `impl Future<Output = &u32>`
|
||||
| this parameter and the returned future are declared with different lifetimes...
|
||||
LL | f
|
||||
| ^ ...but data from `f` is returned here
|
||||
| ^ ...but data from `f` is held across an await point here
|
||||
|
||||
error: aborting due to 5 previous errors
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue