Commit c855bf6

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Add a test

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	`1`	`+pub trait Bar: Super<SuperAssoc: Bound> {}`
	`2`	`+`
	`3`	`+pub trait Super {`
	`4`	`+ type SuperAssoc;`
	`5`	`+}`
	`6`	`+`
	`7`	`+pub trait Bound {}`

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	`1`	`+//@ aux-build:implied-predicates.rs`
	`2`	`+`
	`3`	`+extern crate implied_predicates;`
	`4`	`+use implied_predicates::Bar;`
	`5`	`+`
	`6`	`+fn bar<B: Bar>() {}`
	`7`	`+`
	`8`	`+fn main() {}`

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	`1`	+error[E0277]: the trait bound `<B as Super>::SuperAssoc: implied_predicates::Bound` is not satisfied
	`2`	`+ --> $DIR/implied-predicates.rs:6:11`
	`3`	`+ \|`
	`4`	`+LL \| fn bar<B: Bar>() {}`
	`5`	+ \| ^^^ the trait `implied_predicates::Bound` is not implemented for `<B as Super>::SuperAssoc`
	`6`	`+ \|`
	`7`	+note: required by a bound in `Bar`
	`8`	`+ --> $DIR/auxiliary/implied-predicates.rs:1:34`
	`9`	`+ \|`
	`10`	`+LL \| pub trait Bar: Super<SuperAssoc: Bound> {}`
	`11`	+ \| ^^^^^ required by this bound in `Bar`
	`12`	`+help: consider further restricting the associated type`
	`13`	`+ \|`
	`14`	`+LL \| fn bar<B: Bar>() where <B as Super>::SuperAssoc: implied_predicates::Bound {}`
	`15`	`+ \| +++++++++++++++++++++++++++++++++++++++++++++++++++++++++`
	`16`	`+`
	`17`	`+error: aborting due to 1 previous error`
	`18`	`+`
	`19`	+For more information about this error, try `rustc --explain E0277`.

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