rust/tests/ui/async-await/issue-67765-async-diagnostic.stderr

error[E0515]: cannot return value referencing local variable `s`
  --> $DIR/issue-67765-async-diagnostic.rs:13:5
   |
LL |     let b = &s[..];
   |              - `s` is borrowed here
LL |
LL |     Err(b)?;
   |     ^^^^^^^ returns a value referencing data owned by the current function

error: aborting due to previous error

For more information about this error, try `rustc --explain E0515`.
Use an 'approximate' universal upper bound when reporting region errors Fixes #67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display some named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`. 2020-06-27 12:54:56 -05:00			error[E0515]: cannot return value referencing local variable `s`
Remove predicates on associated types from traits These need to only be bounds to avoid cycle errors in trait checking. 2020-07-04 06:15:04 -05:00			`--> $DIR/issue-67765-async-diagnostic.rs:13:5`
Use an 'approximate' universal upper bound when reporting region errors Fixes #67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display some named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`. 2020-06-27 12:54:56 -05:00			`\|`
			`LL \| let b = &s[..];`
			\| - `s` is borrowed here
fix one more case of trailing space 2022-06-08 13:07:59 -05:00			`LL \|`
Use an 'approximate' universal upper bound when reporting region errors Fixes #67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display some named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`. 2020-06-27 12:54:56 -05:00			`LL \| Err(b)?;`
Remove predicates on associated types from traits These need to only be bounds to avoid cycle errors in trait checking. 2020-07-04 06:15:04 -05:00			`\| ^^^^^^^ returns a value referencing data owned by the current function`
Use an 'approximate' universal upper bound when reporting region errors Fixes #67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display some named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`. 2020-06-27 12:54:56 -05:00
			`error: aborting due to previous error`

			For more information about this error, try `rustc --explain E0515`.