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rust/src/test/ui/generator/not-send-sync.stderr

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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 02:40:56 -05:00
error[E0277]: `Cell<i32>` cannot be shared between threads safely
Remove licenses
2018-12-25 09:56:47 -06:00
--> $DIR/not-send-sync.rs:16:5
Add UI test outputs
2017-08-09 18:37:56 -05:00
|
Update UI tests
2018-02-22 18:42:32 -06:00
LL | assert_send(|| {
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 02:40:56 -05:00
| ^^^^^^^^^^^ `Cell<i32>` cannot be shared between threads safely
Add UI test outputs
2017-08-09 18:37:56 -05:00
|
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 02:40:56 -05:00
= help: the trait `Sync` is not implemented for `Cell<i32>`
= note: required because of the requirements on the impl of `Send` for `&Cell<i32>`
Greatly improve error reporting for futures and generators in `note_obligation_cause_code` Most futures don't go through this code path, because they're caught by `maybe_note_obligation_cause_for_async_await`. But all generators do, and `maybe_note` is imperfect and doesn't catch all futures. Improve the error message for those it misses. At some point, we may want to consider unifying this with the code for `maybe_note_async_await`, so that `async_await` notes all parent constraints, and `note_obligation` can point to yield points. But both functions are quite complicated, and it's not clear to me how to combine them; this seems like a good incremental improvement.
2022-06-19 13:59:36 -05:00
note: required because it's used within this generator
--> $DIR/not-send-sync.rs:16:17
|
Shorten span for closures.
2022-06-27 00:45:35 -05:00
LL | assert_send(|| {
| ^^
Use note to point at bound introducing requirement
2021-07-31 11:26:55 -05:00
note: required by a bound in `assert_send`
--> $DIR/not-send-sync.rs:7:23
|
LL | fn assert_send<T: Send>(_: T) {}
| ^^^^ required by this bound in `assert_send`
Add UI test outputs
2017-08-09 18:37:56 -05:00
Use "generator" instead of "future" when appropriate
2020-03-24 23:13:05 -05:00
error: generator cannot be shared between threads safely
Remove licenses
2018-12-25 09:56:47 -06:00
--> $DIR/not-send-sync.rs:9:5
Add UI test outputs
2017-08-09 18:37:56 -05:00
|
Update UI tests
2018-02-22 18:42:32 -06:00
LL | assert_sync(|| {
Improve span label
2020-03-24 20:51:16 -05:00
| ^^^^^^^^^^^ generator is not `Sync`
Add UI test outputs
2017-08-09 18:37:56 -05:00
|
Shorten span for closures.
2022-06-27 00:45:35 -05:00
= help: within `[generator@$DIR/not-send-sync.rs:9:17: 9:19]`, the trait `Sync` is not implemented for `Cell<i32>`
Incorporate feedback into diagnostics
2020-04-08 13:54:31 -05:00
note: generator is not `Sync` as this value is used across a yield
async/await: more improvements to non-send errors Signed-off-by: David Wood <david@davidtw.co>
2019-10-06 17:14:34 -05:00
--> $DIR/not-send-sync.rs:12:9
|
LL | let a = Cell::new(2);
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 02:40:56 -05:00
| - has type `Cell<i32>` which is not `Sync`
async/await: more improvements to non-send errors Signed-off-by: David Wood <david@davidtw.co>
2019-10-06 17:14:34 -05:00
LL | yield;
| ^^^^^ yield occurs here, with `a` maybe used later
LL | });
| - `a` is later dropped here
Use note to point at bound introducing requirement
2021-07-31 11:26:55 -05:00
note: required by a bound in `assert_sync`
--> $DIR/not-send-sync.rs:6:23
|
LL | fn assert_sync<T: Sync>(_: T) {}
| ^^^^ required by this bound in `assert_sync`
Add UI test outputs
2017-08-09 18:37:56 -05:00
error: aborting due to 2 previous errors
update tests
2018-03-03 08:59:40 -06:00
For more information about this error, try `rustc --explain E0277`.
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