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rust/tests/ui/impl-trait/auto-trait-leak2.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 10:40:56 +03:00
error[E0277]: `Rc<Cell<i32>>` cannot be sent between threads safely
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
--> $DIR/auto-trait-leak2.rs:20:10
Add existential type definitons
2018-05-22 14:31:56 +02:00
|
Point at the def span of trait refs E0277
2019-12-15 22:20:30 -08:00
LL | fn before() -> impl Fn(i32) {
Fix printing unit return ty, don't elaborate FnOnce unless we see it
2021-11-23 10:34:01 -08:00
| ------------ within this `impl Fn(i32)`
Point at the def span of trait refs E0277
2019-12-15 22:20:30 -08:00
...
Add existential type definitons
2018-05-22 14:31:56 +02:00
LL | send(before());
fix(rustc_typeck): report function argument errors on matching type Fixes #90101
2021-10-22 13:49:12 -07:00
| ---- ^^^^^^^^ `Rc<Cell<i32>>` cannot be sent between threads safely
| |
| required by a bound introduced by this call
Add existential type definitons
2018-05-22 14:31:56 +02:00
|
Fix printing unit return ty, don't elaborate FnOnce unless we see it
2021-11-23 10:34:01 -08:00
= help: within `impl Fn(i32)`, the trait `Send` is not implemented for `Rc<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 closure
--> $DIR/auto-trait-leak2.rs:10:5
|
LL | move |x| p.set(x)
Shorten span for closures.
2022-06-27 07:45:35 +02:00
| ^^^^^^^^
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 appears within the type `impl Fn(i32)`
--> $DIR/auto-trait-leak2.rs:5:16
|
LL | fn before() -> impl Fn(i32) {
| ^^^^^^^^^^^^
Use note to point at bound introducing requirement
2021-07-31 09:26:55 -07:00
note: required by a bound in `send`
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
--> $DIR/auto-trait-leak2.rs:13:12
Use note to point at bound introducing requirement
2021-07-31 09:26:55 -07:00
|
LL | fn send<T: Send>(_: T) {}
| ^^^^ required by this bound in `send`
Add existential type definitons
2018-05-22 14:31:56 +02:00
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 10:40:56 +03:00
error[E0277]: `Rc<Cell<i32>>` cannot be sent between threads safely
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
--> $DIR/auto-trait-leak2.rs:25:10
Add existential type definitons
2018-05-22 14:31:56 +02:00
|
LL | send(after());
fix(rustc_typeck): report function argument errors on matching type Fixes #90101
2021-10-22 13:49:12 -07:00
| ---- ^^^^^^^ `Rc<Cell<i32>>` cannot be sent between threads safely
| |
| required by a bound introduced by this call
Point at the def span of trait refs E0277
2019-12-15 22:20:30 -08:00
...
LL | fn after() -> impl Fn(i32) {
Fix printing unit return ty, don't elaborate FnOnce unless we see it
2021-11-23 10:34:01 -08:00
| ------------ within this `impl Fn(i32)`
Add existential type definitons
2018-05-22 14:31:56 +02:00
|
Fix printing unit return ty, don't elaborate FnOnce unless we see it
2021-11-23 10:34:01 -08:00
= help: within `impl Fn(i32)`, the trait `Send` is not implemented for `Rc<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 closure
--> $DIR/auto-trait-leak2.rs:38:5
|
LL | move |x| p.set(x)
Shorten span for closures.
2022-06-27 07:45:35 +02:00
| ^^^^^^^^
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 appears within the type `impl Fn(i32)`
--> $DIR/auto-trait-leak2.rs:33:15
|
LL | fn after() -> impl Fn(i32) {
| ^^^^^^^^^^^^
Use note to point at bound introducing requirement
2021-07-31 09:26:55 -07:00
note: required by a bound in `send`
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
--> $DIR/auto-trait-leak2.rs:13:12
Use note to point at bound introducing requirement
2021-07-31 09:26:55 -07:00
|
LL | fn send<T: Send>(_: T) {}
| ^^^^ required by this bound in `send`
Add existential type definitons
2018-05-22 14:31:56 +02:00
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
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