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		5b54286640
		
	
	
	
	
		
			
			Remove the "which is required by `{root_obligation}`" post-script in
"the trait `X` is not implemented for `Y`" explanation in E0277. This
information is already conveyed in the notes explaining requirements,
making it redundant while making the text (particularly in labels)
harder to read.
```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
  --> $DIR/wf-static-type.rs:10:13
   |
LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
   |             ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`
   |
   = note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
  --> $DIR/wf-static-type.rs:7:17
   |
LL | struct IsCopy<T:Copy> { t: T }
   |                 ^^^^ required by this bound in `IsCopy`
```
vs the prior
```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
  --> $DIR/wf-static-type.rs:10:13
   |
LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
   |             ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`, which is required by `Option<NotCopy>: Copy`
   |
   = note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
  --> $DIR/wf-static-type.rs:7:17
   |
LL | struct IsCopy<T:Copy> { t: T }
   |                 ^^^^ required by this bound in `IsCopy`
```
		
	
			
		
			
				
	
	
		
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| error: coroutine cannot be sent between threads safely
 | |
|   --> $DIR/drop-yield-twice.rs:7:5
 | |
|    |
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| LL | /     assert_send(#[coroutine] || {
 | |
| LL | |         let guard = Foo(42);
 | |
| LL | |         yield;
 | |
| LL | |         drop(guard);
 | |
| LL | |         yield;
 | |
| LL | |     })
 | |
|    | |______^ coroutine is not `Send`
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|    |
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|    = help: within `{coroutine@$DIR/drop-yield-twice.rs:7:30: 7:32}`, the trait `Send` is not implemented for `Foo`
 | |
| note: coroutine is not `Send` as this value is used across a yield
 | |
|   --> $DIR/drop-yield-twice.rs:9:9
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|    |
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| LL |         let guard = Foo(42);
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|    |             ----- has type `Foo` which is not `Send`
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| LL |         yield;
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|    |         ^^^^^ yield occurs here, with `guard` maybe used later
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| note: required by a bound in `assert_send`
 | |
|   --> $DIR/drop-yield-twice.rs:15:19
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|    |
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| LL | fn assert_send<T: Send>(_: T) {}
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|    |                   ^^^^ required by this bound in `assert_send`
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| 
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| error: aborting due to 1 previous error
 | |
| 
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