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rust/tests/ui/async-await/issue-64130-non-send-future-diags.stderr

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async/await: more improvements to non-send errors Signed-off-by: David Wood <david@davidtw.co>
2019-10-06 22:14:34 +00:00
error: future cannot be sent between threads safely
Feature gate and make must_not_suspend allow-by-default This lint is not yet ready for stable use, primarily due to false positives in edge cases; we want to test it out more before stabilizing.
2021-10-12 16:10:05 +00:00
--> $DIR/issue-64130-non-send-future-diags.rs:23:13
async/await: improve obligation errors This commit improves obligation errors for async/await: ``` note: future does not implement `std::marker::Send` because this value is used across an await --> $DIR/issue-64130-non-send-future-diags.rs:15:5 | LL | let g = x.lock().unwrap(); | - has type `std::sync::MutexGuard<'_, u32>` LL | baz().await; | ^^^^^^^^^^^ await occurs here, with `g` maybe used later LL | } | - `g` is later dropped here ``` Signed-off-by: David Wood <david@davidtw.co>
2019-09-25 12:58:41 +00:00
|
LL | is_send(foo());
fix(rustc_typeck): report function argument errors on matching type Fixes #90101
2021-10-22 20:49:12 +00:00
| ^^^^^ future returned by `foo` is not `Send`
async/await: improve obligation errors This commit improves obligation errors for async/await: ``` note: future does not implement `std::marker::Send` because this value is used across an await --> $DIR/issue-64130-non-send-future-diags.rs:15:5 | LL | let g = x.lock().unwrap(); | - has type `std::sync::MutexGuard<'_, u32>` LL | baz().await; | ^^^^^^^^^^^ await occurs here, with `g` maybe used later LL | } | - `g` is later dropped here ``` Signed-off-by: David Wood <david@davidtw.co>
2019-09-25 12:58:41 +00:00
|
Provide more context on derived obligation error primary label Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote: ``` error[E0277]: the trait bound `i32: Bar` is not satisfied --> f100.rs:6:6 | 6 | <i32 as Foo>::foo(); | ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo` | help: this trait has no implementations, consider adding one --> f100.rs:2:1 | 2 | trait Bar {} | ^^^^^^^^^ note: required for `i32` to implement `Foo` --> f100.rs:3:14 | 3 | impl<T: Bar> Foo for T {} | --- ^^^ ^ | | | unsatisfied trait bound introduced here ``` Fix #40120.
2024-01-29 18:31:02 +00:00
= help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `MutexGuard<'_, u32>`, which is required by `impl Future<Output = ()>: Send`
async/await: more improvements to non-send errors Signed-off-by: David Wood <david@davidtw.co>
2019-10-06 22:14:34 +00:00
note: future is not `Send` as this value is used across an await
Tweak await span
2023-04-25 18:59:16 +00:00
--> $DIR/issue-64130-non-send-future-diags.rs:17:11
async/await: improve obligation errors This commit improves obligation errors for async/await: ``` note: future does not implement `std::marker::Send` because this value is used across an await --> $DIR/issue-64130-non-send-future-diags.rs:15:5 | LL | let g = x.lock().unwrap(); | - has type `std::sync::MutexGuard<'_, u32>` LL | baz().await; | ^^^^^^^^^^^ await occurs here, with `g` maybe used later LL | } | - `g` is later dropped here ``` Signed-off-by: David Wood <david@davidtw.co>
2019-09-25 12:58:41 +00:00
|
LL | let g = x.lock().unwrap();
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not.
2020-09-02 07:40:56 +00:00
| - has type `MutexGuard<'_, u32>` which is not `Send`
async/await: improve obligation errors This commit improves obligation errors for async/await: ``` note: future does not implement `std::marker::Send` because this value is used across an await --> $DIR/issue-64130-non-send-future-diags.rs:15:5 | LL | let g = x.lock().unwrap(); | - has type `std::sync::MutexGuard<'_, u32>` LL | baz().await; | ^^^^^^^^^^^ await occurs here, with `g` maybe used later LL | } | - `g` is later dropped here ``` Signed-off-by: David Wood <david@davidtw.co>
2019-09-25 12:58:41 +00:00
LL | baz().await;
Tweak await span
2023-04-25 18:59:16 +00:00
| ^^^^^ await occurs here, with `g` maybe used later
Use note to point at bound introducing requirement
2021-07-31 16:26:55 +00:00
note: required by a bound in `is_send`
Feature gate and make must_not_suspend allow-by-default This lint is not yet ready for stable use, primarily due to false positives in edge cases; we want to test it out more before stabilizing.
2021-10-12 16:10:05 +00:00
--> $DIR/issue-64130-non-send-future-diags.rs:9:15
Use note to point at bound introducing requirement
2021-07-31 16:26:55 +00:00
|
LL | fn is_send<T: Send>(t: T) { }
| ^^^^ required by this bound in `is_send`
async/await: improve obligation errors This commit improves obligation errors for async/await: ``` note: future does not implement `std::marker::Send` because this value is used across an await --> $DIR/issue-64130-non-send-future-diags.rs:15:5 | LL | let g = x.lock().unwrap(); | - has type `std::sync::MutexGuard<'_, u32>` LL | baz().await; | ^^^^^^^^^^^ await occurs here, with `g` maybe used later LL | } | - `g` is later dropped here ``` Signed-off-by: David Wood <david@davidtw.co>
2019-09-25 12:58:41 +00:00
Show number in error message even for one error Co-authored-by: Adrian <adrian.iosdev@gmail.com>
2023-11-21 15:44:16 +00:00
error: aborting due to 1 previous error
async/await: improve obligation errors This commit improves obligation errors for async/await: ``` note: future does not implement `std::marker::Send` because this value is used across an await --> $DIR/issue-64130-non-send-future-diags.rs:15:5 | LL | let g = x.lock().unwrap(); | - has type `std::sync::MutexGuard<'_, u32>` LL | baz().await; | ^^^^^^^^^^^ await occurs here, with `g` maybe used later LL | } | - `g` is later dropped here ``` Signed-off-by: David Wood <david@davidtw.co>
2019-09-25 12:58:41 +00:00
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