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6efddac288
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:
```
error[E0277]: the trait bound `i32: Bar` is not satisfied
--> f100.rs:6:6
|
6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
|
help: this trait has no implementations, consider adding one
--> f100.rs:2:1
|
2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
|
3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
403 lines
15 KiB
Plaintext
403 lines
15 KiB
Plaintext
error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:53:46
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LL | want(Wrapper { value: Burrito { filling: q } });
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `Wrapper<Burrito<Q>>: T1`
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| required by a bound introduced by this call
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note: required for `Burrito<Q>` to implement `T2`
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--> $DIR/blame-trait-error.rs:11:13
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LL | impl<A: T3> T2 for Burrito<A> {}
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| -- ^^ ^^^^^^^^^^
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| unsatisfied trait bound introduced here
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note: required for `Wrapper<Burrito<Q>>` to implement `T1`
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--> $DIR/blame-trait-error.rs:6:13
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LL | impl<B: T2> T1 for Wrapper<B> {}
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| -- ^^ ^^^^^^^^^^
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| unsatisfied trait bound introduced here
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: `()` is not an iterator
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--> $DIR/blame-trait-error.rs:56:15
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LL | want(Some(()));
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| ---- ^^ `()` is not an iterator
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| required by a bound introduced by this call
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= help: the trait `Iterator` is not implemented for `()`, which is required by `Option<()>: T1`
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= help: the trait `T1` is implemented for `Option<It>`
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note: required for `Option<()>` to implement `T1`
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--> $DIR/blame-trait-error.rs:21:20
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LL | impl<It: Iterator> T1 for Option<It> {}
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| -------- ^^ ^^^^^^^^^^
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| |
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| unsatisfied trait bound introduced here
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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error[E0277]: `Q` is not an iterator
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--> $DIR/blame-trait-error.rs:59:15
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LL | want(Some(q));
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| ---- ^ `Q` is not an iterator
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| required by a bound introduced by this call
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note: required for `Option<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:21:20
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LL | impl<It: Iterator> T1 for Option<It> {}
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| -------- ^^ ^^^^^^^^^^
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| unsatisfied trait bound introduced here
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: std::iter::Iterator>(q: Q) {
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| +++++++++++++++++++++
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error[E0277]: `Q` is not an iterator
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--> $DIR/blame-trait-error.rs:62:16
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LL | want(&Some(q));
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| ---- ^ `Q` is not an iterator
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| required by a bound introduced by this call
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note: required for `Option<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:21:20
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LL | impl<It: Iterator> T1 for Option<It> {}
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| -------- ^^ ^^^^^^^^^^
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| unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&Option<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: std::iter::Iterator>(q: Q) {
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| +++++++++++++++++++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:65:45
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LL | want(&ExampleTuple::ExampleTupleVariant(q));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleTuple<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleTuple<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:35:9
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LL | impl<A> T1 for ExampleTuple<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleTuple<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:68:31
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LL | want(&ExampleTupleVariant(q));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleTuple<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleTuple<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:35:9
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LL | impl<A> T1 for ExampleTuple<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleTuple<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:71:50
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LL | want(&ExampleOtherTuple::ExampleTupleVariant(q));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleTuple<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleTuple<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:35:9
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LL | impl<A> T1 for ExampleTuple<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleTuple<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:74:44
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LL | want(&ExampleDifferentTupleVariantName(q));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleTuple<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleTuple<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:35:9
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LL | impl<A> T1 for ExampleTuple<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleTuple<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:77:45
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LL | want(&ExampleYetAnotherTupleVariantName(q));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleTuple<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleTuple<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:35:9
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LL | impl<A> T1 for ExampleTuple<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleTuple<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:80:56
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LL | want(&ExampleStruct::ExampleStructVariant { field: q });
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| ---- required by a bound introduced by this call ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleStruct<Q>: T1`
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note: required for `ExampleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:45:9
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LL | impl<A> T1 for ExampleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:83:41
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LL | want(&ExampleStructVariant { field: q });
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleStruct<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:45:9
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LL | impl<A> T1 for ExampleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:86:61
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LL | want(&ExampleOtherStruct::ExampleStructVariant { field: q });
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| ---- required by a bound introduced by this call ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleStruct<Q>: T1`
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note: required for `ExampleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:45:9
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LL | impl<A> T1 for ExampleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:89:54
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LL | want(&ExampleDifferentStructVariantName { field: q });
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| ---- required by a bound introduced by this call ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleStruct<Q>: T1`
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note: required for `ExampleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:45:9
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LL | impl<A> T1 for ExampleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:92:55
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LL | want(&ExampleYetAnotherStructVariantName { field: q });
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| ---- required by a bound introduced by this call ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleStruct<Q>: T1`
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note: required for `ExampleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:45:9
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LL | impl<A> T1 for ExampleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:95:38
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LL | want(&ExampleActuallyTupleStruct(q, 0));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleActuallyTupleStruct<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleActuallyTupleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:50:9
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LL | impl<A> T1 for ExampleActuallyTupleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleActuallyTupleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error[E0277]: the trait bound `Q: T3` is not satisfied
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--> $DIR/blame-trait-error.rs:98:43
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LL | want(&ExampleActuallyTupleStructOther(q, 0));
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| ---- ^ the trait `T3` is not implemented for `Q`, which is required by `&ExampleActuallyTupleStruct<Q>: T1`
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| required by a bound introduced by this call
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note: required for `ExampleActuallyTupleStruct<Q>` to implement `T1`
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--> $DIR/blame-trait-error.rs:50:9
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LL | impl<A> T1 for ExampleActuallyTupleStruct<A> where A: T3 {}
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| ^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&ExampleActuallyTupleStruct<Q>` to implement `T1`
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note: required by a bound in `want`
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--> $DIR/blame-trait-error.rs:25:12
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LL | fn want<V: T1>(_x: V) {}
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| ^^ required by this bound in `want`
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help: consider restricting type parameter `Q`
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LL | fn example<Q: T3>(q: Q) {
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| ++++
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error: aborting due to 16 previous errors
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For more information about this error, try `rustc --explain E0277`.
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